514
20
16481
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Conference Papers
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Faculty Publications- Conference Papers
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Title
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Mechanical and abrasive wear behaviour of waste silk fiber reinforced epoxy biocomposites using taguchi method
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Epoxy biocomposites; Specific wear rate; Taguchi technique; Wear
Description
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The aim of this research article is to study the static mechanical properties and abrasive wear behavior of epoxy biocomposites reinforced with different weight percentage of waste silk fibers. The effect of parameters such as velocity (A), load (B), fiber loading (C) and abrading distance (D) on abrasive wear has been considered using Taguchi's L25 orthogonal array. The objective is to examine parameters which significantly affect the abrasive wear of biocomposites. The addition of silk fiber has resulted in improved flexural properties of the epoxy matrix. The results of ANOVA indicated that the parameter which played a significant role was abrading distance followed by fiber loading, load and sliding velocity. 2019 Trans Tech Publications Ltd, Switzerland.
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Darshan S.M.; Suresha B.
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Materials Science Forum, Vol-969 MSF, pp. 787-793.
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Trans Tech Publications Ltd
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2019-01-01
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<a href="https://doi.org/10.4028/www.scientific.net/MSF.969.787" target="_blank" rel="noreferrer noopener">https://doi.org/10.4028/www.scientific.net/MSF.969.787</a>
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ISSN: 2555476; ISBN: 978-303571432-6; CODEN: MSFOE
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Online
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English
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Conference paper
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Darshan S.M., Department of Mechanical Engineering, The National Institute of Engineering, Mysuru, 570 008, Karnataka, India, Department of Mechanical Engineering, CHRIST University, Bengaluru, 560 029, Karnataka, India; Suresha B., Department of Mechanical Engineering, The National Institute of Engineering, Mysuru, 570 008, Karnataka, India
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Articles
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Title
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Mechanical and Dielectric Properties of InTe Crystals
Subject
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Chemistry
Description
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Crystal Structure Theory and Applications, Vol-1, pp. 79-83.
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Mathew Teena, Kunjomana A.G, Munirathnam Keelapattu, Chandrasekharan K.A, Meena Muthukrishnan, Mahadevan C.K.
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Crystal Structure Theory and Applications
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2012
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English
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Faculty Publications
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Sharma, Manoj; Sharma, Rajeev; Pandian P, Pal; Padhi, Manas Ranjan; Singh, Akhilesh Kumar; Arockiam, A. Joseph
Title
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Mechanical and moisture resistance properties of flax and jute fiber embedded epoxy composites for lightweight structural applications
Date
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01-01-2026
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Composite Interfaces;
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<a href="https://doi.org/10.1080/09276440.2025.2601435" target="_blank" rel="noreferrer noopener">https://doi.org/10.1080/09276440.2025.2601435</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105029163169?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105029163169?origin=resultslist</a>
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Sharma M., Department of Mechanical Engineering, Amity University Rajasthan, Jaipur, India; Sharma R., Amity School of Engineering & Technology, Amity University Rajasthan, Jaipur, India; Pandian P P., Department of Mechanical Engineering, Christ University, Bengaluru, India; Padhi M.R., Department of Mechanical Engineering, Centurion University of Technology and Management, Paralakhemundi, India; Singh A.K., Department of Mechanical Engineering, Aditya University, Surampalem, India; Arockiam A.J., Department of Mechanical (Automobile) Engineering, Arasu Engineering College, Kumbakonam, India
Description
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Natural fiber-based materials are increasingly used as substitutes for traditional materials in structural applications. This research evaluated the mechanical and moisture resistance characteristics of unidirectionally oriented Flax and Jute fiber-embedded Epoxy Composites (FJEC) for lightweight structural applications. The inclusion of nano clay in the natural laminates creates more energy-absorbing sites, which improves the ability to withstand impact forces compared to FJEC. The material strength of nano clay-infused hybrid composite attained 94.46 MPa, 98.44 MPa, and 92 KJ/m2 tensile, flexural and impact strength. The consequences of water absorption and humidity exposure to the materials revealed that nano clay helps to reduce the diffusion of water into the surface of the laminate. The nano clay-infused hybrid composite is subjected to Freeze-Thaw (Fz-Tw) cycling under both partial and complete immersion scenarios to analyze the durability and resilience of the composite. The performance loss in nano-clay-infused laminate is caused due to the prolonged exposure to water and thermal stress. The damage factor for a partially and completely immersed hybrid material is 1.2% and 2.2%, respectively. These findings highlighted the need for considering environmental conditions while designing and utilizing fiber incorporated materials in various applications. 2026 Informa UK Limited, trading as Taylor & Francis Group.
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mechanical performance; moisture saturation; nano-clay; Natural fiber; performance loss; water immersion condition
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Taylor and Francis Ltd.
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ISSN: 9276440; CODEN: CMNTE
Language
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English
Type
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Article
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Restricted Access; Hardcopy may be available in the library
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online
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Title
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Conference Papers
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Title
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Mechanical and tribological investigation on al lm4/tic composite fabricated through bottom pouring method
Subject
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Aluminum lm4; Metal matrix composites; Scanning electron microscopy; Stir casting method; Taguchi design of experiment; Titanium carbide
Description
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In the present investigation LM4 reinforced 6 wt% Titanium Carbide particles composite was developed by stir casting bottom pouring method. The cast composite specimen was obtained in a cylindrical shape of dimensions 50 mm dia and 100 mm length. The composite specimens were prepared for mechanical and tribological test as per ASTM standards. The obtained results reveal that the mechanical properties are high as compared to the as cast LM4 alloy specimens. Microstructure analysis confirms that the uniform distribution of TiC particles. Tribological test was performed using pin-on-disc machine based on Taguchi's design of experiments. L27 orthogonal array was selected by changing test parameter like applied load (10, 20, 30 N), sliding distance (600, 800, 1000 m) and sliding velocity (1.5 m/s, 2.5 m/s and 3.5 m/s). The most influencing test parameters were identified by using S/N ratio and ANOVA. The wear results reveled that wear rate increases as applied load increases, and it decreases with decrease in velocity. Also wear rate decreases as sliding distance increases and at some point, it became linear. The applied load was found to be most dominating (77.61%), sliding velocity (10.44%) and sliding distance (4.47%) are less dominating factors. Worn surface morphology was studied to understand the type of wear. 2021 elsevier ltd. all rights reserved.
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Sachit T.S.; Kumar D.V.; Keshavamurthy R.; Kumar G.S.P.
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Materials Today: Proceedings, Vol-43, pp. 2909-2914.
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Elsevier Ltd
Date
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2021-01-01
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<a href="https://doi.org/10.1016/j.matpr.2021.01.169" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.matpr.2021.01.169</a>
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ISSN: 22147853
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Online
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English
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Conference paper
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Sachit T.S., Department of Mechanical Engineering, Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed) University (SIU), Lavale, Pune, Maharashtra, 412115, India; Kumar D.V., Department of Mechanical Engineering, Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed) University (SIU), Lavale, Pune, Maharashtra, 412115, India; Keshavamurthy R., Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bengaluru, Karnataka, 560078, India; Kumar G.S.P., Department of Mechanical Engineering, Christ Deemed to Be University, Bengaluru, Karnataka, India
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Mechanical and tribological properties of polymer composites developed by FDM
Description
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In the coming years, researchers and manufacturers will be more concerned with the demand for products that are easy to construct and can be rendered seamlessly, even at complicated geometries, with the touch of a button. These requirements will be met by the advent of additive manufacturing. This will serve as the catalyst for a revolution. Additive layer manufacturing (ALM), also known as additive manufacturing (AM) or more commonly referred to as 3D printing, is a modern fabrication technology that uses a variety of raw materials to produce items such as medical implants and aircraft wing components by printing layers of material based on 3D digital models. In this chapter, the authors provide a comprehensive overview of the mechanical and tribological behaviour of ceramic, metallic, and fiber-reinforced polymer composites that are made by a range of additive manufacturing (AM) techniques. These composites can be used in a variety of applications, including aerospace, automotive, and medical. 2023, IGI Global. All rights reserved.
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Pradeep Kumar G.S.; Sachit T.S.; Mruthunjaya M.; Harish Kumar M.; Yogaraju R.; Jangam S.
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Development, Properties, and Industrial Applications of 3D Printed Polymer Composites, pp. 53-65.
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IGI Global
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2023-01-01
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<a href="https://doi.org/10.4018/978-1-6684-6009-2.ch004" target="_blank" rel="noreferrer noopener">https://doi.org/10.4018/978-1-6684-6009-2.ch004</a>
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ISBN: 978-166846011-5; 1668460092; 978-166846009-2
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Online
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English
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Book chapter
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Pradeep Kumar G.S., CHRIST University (Deemed), India; Sachit T.S., Symbiosis Institute of Technology, Symbiosis International University (Deemed), India; Mruthunjaya M., JSS Academy of Technical Education, India; Harish Kumar M., CHRIST University (Deemed), India; Yogaraju R., BMS College of Engineering, India; Jangam S., CHRIST University (Deemed), India
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Title
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Mechanical and Wear Behavior of Aluminium Metal Matrix Composites Reinforced Ceramics Materials for Light Structures
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Aluminium Alloy 8011; Density; Microhardness; Silicon Nitride; Wear Test
Description
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Aluminium Alloy based Metal Matrix Composites (AAMMCs) has widely used in defense, aircraft and automobile applications because of their enhanced engineering properties with light weight metals. Nano sized silicon nitride (80 ?m) is used as a reinforcement in this study, whereas aluminium alloy 8011 is selected as the matrix material. Using the stir casting method, metal matrix composites made of aluminium alloy 8011 with varying weight percentages of Si3N4(0, 4, 8, 12, and 16) are created. The stir casted AL 8011/Si3N4composites further heated under T6 condition. The AL 8011/Si3N4 T6 composites are further subjected to Energy Dispersive X ray Analysis (EDAX) and Scanning Electron Microscope (SEM) to identify by the presence of elements and study the microstructure characterization, respectively. The density, microhardness and wear test are conducted by employing Archimedes principle, Vickers hardness tested and pin on disc equipment, respectively. The wear test is done at different sliding distances like (500, 1000, 1500 and 2000 m), applied load like (10, 20, 30 and 40 N) and kept sliding at a speed of 1 m/s. The increasing weight percentage of silicon nitride expands the increasing of density and Vickers hardness up to 12 wt % of silicon nitride and decreasing by 16 wt % addition. The wear resistances of AL 8011/12 wt % Si3N4T6 composite exhibits higher wear resistance than other Al8011 based composites. 2024, Informatics Publishing Limited. All rights reserved.
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Karthick L.; Umashankar M.; Singh A.K.; Bhambere V.L.; Xavier L.F.; Bhandari R.
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Journal of Mines, Metals and Fuels, Vol-72, No. 12, pp. 1347-1359.
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Informatics Publishing Limited
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2024-01-01
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<a href="https://doi.org/10.18311/jmmf/2024/46077" target="_blank" rel="noreferrer noopener">https://doi.org/10.18311/jmmf/2024/46077</a>
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ISSN: 222755; CODEN: JMMFA
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Online
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English
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Article
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Karthick L., Department of Mechanical Engineering, Hindusthan College of Engineering and Technology, Tamil Nadu, Coimbatore, 641032, India; Umashankar M., Department of Mechanical Engineering, Sona College of Technology, Tamil Nadu, Salem, 636005, India; Singh A.K., Department of Mechanical Engineering, Aditya College of Engineering and Technology, Andhra Pradesh, Surampalem, 533437, India; Bhambere V.L., Department of Mechanical Engineering, Jagadambha College of Engineering and Technology, Maharashtra, Yavatmal, 445001, India; Xavier L.F., School of Engineering and Technology, Christ (Deemed to Be University), Kengeri Campus, Karnataka, Bangalore, 560074, India; Bhandari R., Department of Mechanical Engineering, Sanaka Educational Trust's Group of Institutions, Malandighi, West Bengal, Durgapur, 713212, India
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Book Chapter
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Title
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Mechanical and Wear Behavior of Halloysite Nanotubes Filled Silk/Basalt Hybrid Composites Using Response Surface Methodology
Subject
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Box-Behnken design; HNTs; Mechanical properties; Response surface methodology; SF + BF/Ep hybrid composites; Wear; Wear mechanisms
Description
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The aim of this study is to develop bio-friendly light weight polymer nanocomposites for load bearing applications and to evaluate the influence of halloysite nanotubes (HNTs) on mechanical as well as wear behavior of silk fiber (SF) and basalt fiber (BF) reinforced epoxy (Ep) composites. HNT filled biocomposites were fabricated using vacuum bagging technique. The Box-Behnken design (BBD) of experiment with Response surface methodology (RSM) was used to conduct the dry-sliding wear tests on a pin on disc apparatus. Tribo-mechanical properties and worn surface micrographs of hybrid composite samples were analyzed. Hardness, tensile strength and wear resistance behavior of SF + BF/Ep hybrid composites were substantially improved with the incorporation of HNTs. It was observed from the confirmation test that there is a strong agreement between the experimental findings as well as the predicted values, with a minimum reported error of <5% for HNT-SF + BF/Ep hybrid nanocomposites. SEM micrographs of the worn-out surface of HNT filled SF + BF/Ep composite exhibited fiber breakage, pulverized matrix, good interfacial bonding and fractured fibers. The novelty of the current research work is the development of eco-friendly polymeric composites for wear resistant and structural applications. The effect of hybridization (fiberssilk and basalt, fillersHNTs) on the tribo-mechanical properties of polymeric composites were investigated for the first time. The study showed that the mechanical as well as the tribological properties of SF and BF reinforced epoxy composites were enhanced with the addition of nanofiller. The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.
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Darshan S.M.; Suresha B.; Harshavardhan B.; Vanarotti M.B.; Waddar S.; Thomas S.; Xavier L.F.
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Springer Proceedings in Materials, Vol-32, pp. 387-402.
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Springer Nature
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2023-01-01
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<a href="https://doi.org/10.1007/978-981-99-5567-1_29" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/978-981-99-5567-1_29</a>
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ISSN: 26623161
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Online
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English
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Book chapter
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Darshan S.M., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bengaluru, 570008, India; Suresha B., Department of Mechanical Engineering, The National Institute of Engineering, Mysuru, 570008, India; Harshavardhan B., Department of Mechanical Engineering, The National Institute of Engineering, Mysuru, 570008, India; Vanarotti M.B., Department of Mechanical Engineering, Kolhapur Institute of Technologys, College of Engineering, Kolhapur, 416234, India; Waddar S., Department of Mechanical Engineering, MVJ College of Engineering, Bengaluru, 560067, India; Thomas S., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bengaluru, 570008, India; Xavier L.F., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bengaluru, 570008, India
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Faculty Publications
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Hanumantharayappa, Naresh; Sanikere, Prashantha; Kodandappa, Ramesha; Nagaraja, Santhosh
Title
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Mechanical Characterization of Cu-Al-based Shape Memory Alloys: Influence of Mn, Be and Fe on Tensile Strength, Yield Stress, Yield Strain, Ductility and Hardness
Date
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01-01-2026
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Applied Science and Engineering Progress;Volume;19;Issue;2;Article No.;7981;
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<a href="https://doi.org/10.14416/j.asep.2025.11.006" target="_blank" rel="noreferrer noopener">https://doi.org/10.14416/j.asep.2025.11.006</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105033938304?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105033938304?origin=resultslist</a>
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Hanumantharayappa N., Department of Mechanical Engineering, Siddaganga Institute of Technology, Karnataka, Tumakuru, India; Sanikere P., Department of Mechanical Engineering, Siddaganga Institute of Technology, Karnataka, Tumakuru, India; Kodandappa R., Department of Mechanical and Automobile Engineering, Christ University, Kengeri, Bangalore, India; Nagaraja S., Department of Mechanical Engineering, MVJ College of Engineering, Near ITPB, Whitefield, Bangalore, India
Description
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The pursuit of cost-effective and robust Shape Memory Alloys (SMAs) continues to expand, especially for applications in adaptive and smart structural systems, while Ni-Ti-based SMAs remain prevalent due to their superior pseudoelasticity and longevity. However, the limitations of NiTi alloys, including the high processing costs and fabrication difficulties, prompt the exploration of alternatives. This study investigates Cu-Al-based SMAs alloyed with Mn, Be, and Fe as cost-effective alternatives to NiTi systems. In the present work, Cu-Al-based alloy wires with Mn, Be, and Fe were betatized at 850 C and water-quenched to achieve martensitic structures, followed by evaluation of tensile strength, yield behavior, ductility, and hardness. Mn addition significantly enhanced tensile strength (up to 425 MPa), while Be and Fe improved ductility through grain refinement. Hardness increased with Mn due to solid solution strengthening. Thus, the current work provides a comparative analysis of Cu-Al-Mn, Cu-Al-Be-Mn, and Cu-Al-Fe-Mn alloys, linking alloying strategies to microstructural evolution and mechanical performance, demonstrating their potential for advanced engineering applications. 2025 King Mongkuts University of Technology North Bangkok. All Rights Reserved.
Subject
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Composite variants; Crack strength; Materials; Residual strength; Shape memory alloy; Shape recovery
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Academic Enhancement Department, King Mongkut's University of Technology North Bangkok
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ISSN: 26729156;
Language
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English
Type
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Article
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online
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Title
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Mechanical Properties and Analysis of Two-body Abrasive Wear Behaviour of Graphene Modified Carbon/Epoxy Composites Using Taguchis Technique
Subject
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ANOVA; Carbon-epoxy; Graphene nanoplatelets; Specific wear rate; Taguchi technique; Wear mechanisms
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The present work emphasizes the effect of graphene nanoplatelets (G) filler loading on mechanical and abrasive wear behavior of carbon fibre reinforced epoxy (C/E) composites. Graphene nanoplatelets were mixed with epoxy framework using a temperature-controlled magnetic stirrer and then ultrasonically treated. The parameters considered for the abrasive wear study are the applied load in N (5, 10 and 15), abrading distance in m (75, 150, and 225) and weight percentage of reinforcement (0, 1, and 1.5). The incorporation of 1 wt. % G into C/E composites increases hardness by 14 % and interlaminar laminar strength by 19 % when compared to C/E composites. According to the Taguchi design of tests, a filler loading of 1 wt. % G, an abrading distance of 225 m, and an applied load of 15 N are ideal. Analysis of variance (ANOVA) was done to establish the dominant parameter, and the filler loading with abrading distance was shown to be significant. With 36.4 %, the filler loading had the biggest influence on the composite specific wear rate. The combination of filler loading with 1 wt. %, load of 15 N, and abrading distance of 225 m yields the lowest specific wear rate. The involved wear mechanisms during the abrasive wear process have also been explained with scanning electron micrographs. 2024 Published by Faculty of Engineering.
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Shivamurthy A.; Boranna R.; Jagannat R.K.; Prashanth G.R.; Bheemappa S.; Darshan S.M.
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Tribology in Industry, Vol-46, No. 1, pp. 66-79.
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Faculty of Engineering, University of Kragujevac
Date
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2024-01-01
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<a href="https://doi.org/10.24874/ti.1512.07.23.09" target="_blank" rel="noreferrer noopener">https://doi.org/10.24874/ti.1512.07.23.09</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186938594&doi=10.24874%2Fti.1512.07.23.09&partnerID=40&md5=8e9a9d3f73fe8fa1d151c526356b1a49" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186938594&doi=10.24874%2fti.1512.07.23.09&partnerID=40&md5=8e9a9d3f73fe8fa1d151c526356b1a49</a>
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All Open Access; Gold Open Access
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ISSN: 3548996
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Online
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English
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Article
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Shivamurthy A., Department of Electronics and Communication Engineering, National Institute of Technology, Goa, Goa, 403401, India; Boranna R., Department of Electronics and Communication Engineering, JSS Science and Technology University, Karnataka, Mysuru, 570006, India; Jagannat R.K., Department of Applied Science, National Institute of Technology Goa, Goa, 403401, India; Prashanth G.R., Department of Electronics and Communication Engineering, National Institute of Technology, Goa, Goa, 403401, India; Bheemappa S., Department of Mechanical Engineering, The National Institute of Engineering, Karnataka, Mysuru, 570008, India; Darshan S.M., Department of Mechanical and Automobile Engineering, CHRIST (Deemed to be University), Karnataka, Bengaluru, 570008, India
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Conference Papers
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Mechanical Properties of FSW Joints Magnesium Alloy at Different Rotational Speeds
Description
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Magnesium (Mg) has become a focus in the transportation industry due to its potential in reducing fuel consumption and gas emissions while improving recyclability. Mg alloys are also known for their low neutron absorption, good resistant of carbon dioxide as well as thermal conductivity which makes them suitable for use in industrial equipment for nuclear energy. there has been an increasing interest in the research and development of Mg alloys. These are the lightest of all metallic structural materials and are approximately 33% lighter than aluminium (Al) and 75% lighter than ferrous (Fe) alloys and have excellent specific mechanical properties. In this work, FSW of AZ31B Alloy was examined at the various rotational speeds of 900 -1440 rpm, with fixed welding speed of 40mm/min and 2 tool tilt angle using an HSS tool. The mechanical properties were compared for the different rotational speeds. The quality of FSW joints is dependent on input value of heat and material flow rate, which are prejudiced by process parameters., higher rotation speeds may cause abnormal stirring, resulting in a tunnel defect at the weld nugget due to increased strain rate and turbulence. 2024 E3S Web of Conferences
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Vijayaraghavan P.; Bisht Y.S.; Almusawi M.; Subramani K.; Sharma D.
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E3S Web of Conferences, Vol-491
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EDP Sciences
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2024-01-01
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<a href="https://doi.org/10.1051/e3sconf/202449104015" target="_blank" rel="noreferrer noopener">https://doi.org/10.1051/e3sconf/202449104015</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188282078&doi=10.1051%2Fe3sconf%2F202449104015&partnerID=40&md5=0a1bd5148ad78f3a9889512b3cd4e19b" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188282078&doi=10.1051%2fe3sconf%2f202449104015&partnerID=40&md5=0a1bd5148ad78f3a9889512b3cd4e19b</a>
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All Open Access; Gold Open Access
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ISSN: 25550403
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Online
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English
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Conference paper
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Vijayaraghavan P., Department of Mechanical Engineering, Prince Shri Venkateshwara Padmavathy Engineering College, Chennai, 600 127, India; Bisht Y.S., Department of Mechanical Engineering, Uttaranchal Institute of Technology, Uttaranchal University, Dehradun, 248007, India; Almusawi M., The Islamic University, Najaf, Iraq; Subramani K., School of Business and Management, Christ (Deemed to Be University), Bengaluru, India; Sharma D., Department of Management, Uttaranchal Institute of Management, Uttaranchal University, Dehradun, 248007, India
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Conference Papers
Conference Paper
Faculty Publications- Conference Papers
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Title
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Mechanical strength and impact resistance of hybrid fiber reinforced concrete with coconut and polypropylene fibers
Subject
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FRC; HyFRC; Impact Energy; Impact Resistance
Description
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This experimental study investigates the mechanical properties and resistance to impact of concrete reinforced with coconut fibers (CF) and polypropylene fibers (PPF). The fiber proportions were decided based on the results obtained from the tests on coconut fiber reinforced concrete (CFRC) and polypropylene fiber reinforced concrete (PPFRC), tested individually. PP fibers of 12 mm and 24 mm of 0.1%, 0.2%, and 0.3% of the volume of concrete were used in PPFRC. Coconut fibers having 50 mm and 75 mm of 0.2%, 0.3%, and 0.4% of the volume of concrete were used in CFRC. Based on test results, PPF (12 mm) and CF (50 mm) were selected for hybrid fiber reinforced concrete (HyFRC). By varying both PPF and CF content, three different proportions with a total fiber content of 0.2% and 0.3% of the volume of concrete were selected. The improvement in strength was observed to be maximum when the total fiber content in the hybrid fiber reinforced concrete was 0.3%. The increase in impact resistance of HyFRC was almost double that of individual FRC and three times that of plain concrete. 2022
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MD B.; Unnikrishnan S.
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Materials Today: Proceedings, Vol-65, pp. 1873-1880.
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Elsevier Ltd
Date
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2022-01-01
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<a href="https://doi.org/10.1016/j.matpr.2022.05.048" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.matpr.2022.05.048</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130343480&doi=10.1016%2Fj.matpr.2022.05.048&partnerID=40&md5=e172dffb02ed31f605e439ac5c62c4f8" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130343480&doi=10.1016%2fj.matpr.2022.05.048&partnerID=40&md5=e172dffb02ed31f605e439ac5c62c4f8</a>
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Restricted Access
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ISSN: 22147853
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Online
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English
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Conference paper
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MD B., Department of Civil Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, 560074, India; Unnikrishnan S., Department of Civil Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, 560074, India
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Articles
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Title
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Mechanical Strength and Microstructure of GGBS-SCBA based Geopolymer Concrete
Subject
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Calcium aluminate silicate gel; Geopolymer concrete; Scanning electron microscope images; Ultrasonic pulse velocity; X-ray diffraction analysis
Description
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This paper deals with the attempt to develop and study the performance of ground granulated blast furnace slag (GGBS) and sugarcane bagasse ash (SCBA) based sustainable geopolymer concrete. NaOH (8M, 10M, and 12M) and Na2SiO3 were used as alkaline activators with a ratio of 2.5. SCBA mainly acted as amorphous silica and has been utilized as a substitute material for GGBS. The effect of SCBA contents (0%, 5%, 10%, 15% & 20% by the mass of binder) in terms of fresh, hardened, microstructural, and correlation properties of geopolymer concrete developed have been evaluated. Different tests such as the slump cone test, compression test, split tensile test, flexure test, and ultrasonic pulse velocity test were conducted. Scanning electron microscopy, Energy dispersive analysis, and X-ray diffraction analysis were investigated for understanding the microstructural properties. The research findings have shown that with an increase in molarity from 8M to 12M there is an increase in the strength properties of geopolymer concrete. The results in this current study show that 28 days compressive strength was found to increase by 415% when the NaOH molarity was increased from 8M to 10M and 821% when the NaOH molarity was increased from 8M to 12M. The geopolymer concrete developed with 20% SCBA and 80% GGBS with 8M NaOH solution and SS/SH ratio of 2.5 can be used for a target strength of 3035 MPa. Scanning electron microscope images show a packed and dense matrix, which clearly outlines the reason behind the attainment of higher strength in higher molarity of GGBS-SCBA based geopolymer concrete samples and the presence of CASH gel confirmed this in the geopolymer matrix. Furthermore, there is a strong correlation between the experimental findings and the model equations proposed. These presented models will be useful in improving the strength of geopolymer concrete incorporating agricultural and industrial wastes. 2023 The Authors
Creator
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H.M. T.; Unnikrishnan S.
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Journal of Materials Research and Technology, Vol-24, pp. 7816-7831.
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Elsevier Editora Ltda
Date
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2023-01-01
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<a href="https://doi.org/10.1016/j.jmrt.2023.05.051" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.jmrt.2023.05.051</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159281304&doi=10.1016%2Fj.jmrt.2023.05.051&partnerID=40&md5=a48c48fa441b6e857fc2c84446d62b48" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159281304&doi=10.1016%2fj.jmrt.2023.05.051&partnerID=40&md5=a48c48fa441b6e857fc2c84446d62b48</a>
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All Open Access; Gold Open Access
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ISSN: 22387854
Format
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Online
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English
Type
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Article
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H.M. T., Department of Civil Engineering, CHRIST (Deemed to be University), Bangalore, India, Department of Civil Engineering, Ballari Institute of Technology & Management, Ballari, India; Unnikrishnan S., Department of Civil Engineering, CHRIST (Deemed to be University), Bangalore, India
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Title
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Conference Papers
Conference Paper
Faculty Publications- Conference Papers
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Title
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Mechanical strength and water penetration depth of palmyra fibre reinforced concrete
Subject
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Mechanical properties; Palm fibre; Palmyra fibre reinforced concrete; Water penetration
Description
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Natural fibre reinforced composites are replacing the conventional fibre reinforced composites for several applications due to natural fibre availability, variety and lesser raw material cost. Using natural fibres in composites also reduces the issue of agricultural residue disposals, which are in abundance. Different natural fibres exhibit unique properties when it is used in composites and hence there is a need to study the behaviour of scarcely used natural fibres. Indian palmyra trees (Borassus flabellifer) are fast growing commonly found trees in Southern India. From the base of these palm tree leaves, palmyra fibres are taken out. Though these fibres are locally available in huge quantities, these are very rarely used as reinforcing material in concrete compared to other natural fibres like coir, sisal, jute etc. Palmyra fibre reinforced cement composite specimens were prepared by varying the fibre content (0.5%, 1% and 2% by weight of cement) and length of fibre (25 mm and 50 mm). Plain concrete and palmyra fibre reinforced concrete specimens of identical size were tested for mechanical strength and also for its depth of water penetration. The work carried out revealed that the water penetration of palmyra fibre reinforced concrete increased with fibre content increase. The compressive strength of palmyra fibre reinforced concrete improved up to 1% of fibre content and further increase in fibre content upto 2% resulted in compressive strength reduction for both the fibre lengths. However, split tensile strength, flexure strength and shear strength increased with fibre content increase in the mix. Based on the mechanical strength properties investigated, increase in shear strength was found to be more significant with the inclusion of palmyra fibres in concrete. 2022
Creator
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Rai P. S.; N. H.; D.V. K.; Unnikrishnan S.; A. C.
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Materials Today: Proceedings, Vol-65, pp. 1881-1886.
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Elsevier Ltd
Date
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2022-01-01
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<a href="https://doi.org/10.1016/j.matpr.2022.05.049" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.matpr.2022.05.049</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130464272&doi=10.1016%2Fj.matpr.2022.05.049&partnerID=40&md5=96cef00e955a4470cc524c7e9a58b2fe" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130464272&doi=10.1016%2fj.matpr.2022.05.049&partnerID=40&md5=96cef00e955a4470cc524c7e9a58b2fe</a>
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Restricted Access
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ISSN: 22147853
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Online
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English
Type
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Conference paper
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Rai P. S., KVG College of Engineering, DK, Sullia, 574327, India; N. H., K S School of Engineering and Management, Bengaluru, 560109, India; D.V. K., K S School of Engineering and Management, Bengaluru, 560109, India; Unnikrishnan S., CHRIST (Deemed to be University), Bengaluru, 560074, India; A. C., KVG College of Engineering, DK, Sullia, 574327, India
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Faculty Publications
Article
Faculty Publications -Articles
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Singhal, Abhinav; Seema; Saeed, Abdulkafi Mohammed
Title
A name given to the resource
Mechanics of love-type surface wave energy transmission in viscous liquid-coated piezomagnetic plate
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01-01-2025
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Journal of the Brazilian Society of Mechanical Sciences and Engineering;Volume;47;Issue;12;Article No.;658;
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<a href="https://doi.org/10.1007/s40430-025-06009-7" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s40430-025-06009-7</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105018582900?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105018582900?origin=resultslist</a>
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Singhal A., Christ University, Bengaluru, 560029, India; Seema, Christ University, Bengaluru, 560029, India; Saeed A.M., Department of Mathematics, College of Science, Qassim University, Buraydah, 51452, Saudi Arabia
Description
An account of the resource
Purpose: This study investigates Love-type wave propagation in a multilayered structure composed of a viscous liquid (VL) layer, a piezomagnetic (PM) layer, and a heterogeneous half-space (HHS). It considers two models: Model 1 (Terfenol-D) and Model 2 (Cobalt Ferrite). Wave behaviour is analysed under magnetically open (MO) and short (MS) circuit conditions. Methods: The dispersion relation for Love-type waves was derived analytically, and phase velocity graphs were displayed and analysed in Mathematica. A thorough analysis was conducted to establish the impact of critical variables on phase velocity, including material heterogeneity, piezomagnetic coupling, and viscous liquid layer thickness. Findings: Both models show significant effects of VL and PM coupling on phase velocity. Terfenol-D (Model 1) displays higher sensitivity to piezomagnetic effects, while Cobalt Ferrite (Model 2) shows steadier trends. MO and MS conditions yield comparable results, indicating minor boundary effects. Research limitations: The model only considers linear wave transmission and excludes nonlinear effects. Furthermore, the technique is predicated on idealised material properties that account for heterogeneity. Practical Implications: The studys findings can be used to design and develop energy harvesters, sensors, and wave manipulation instruments using PM with viscous liquid coatings. Understanding the behaviour of surface waves, including phase velocity, is essential for efficient application in these frameworks. The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering 2025.
Subject
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Cobalt ferrite; Heterogeneous half-space; Surface wave; Terfenol-D; Viscous liquid
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Springer Science and Business Media Deutschland GmbH
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A related resource
ISSN: 16785878;
Language
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English
Type
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Article
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Restricted Access; Hardcopy may be available in the library
Format
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online
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Title
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Articles
Article
Faculty Publications -Articles
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Mechanics of SH and anti-plane SH waves in orthotropic piezoelectric quasicrystal with multiple surface effect
Description
An account of the resource
Significant restrictions have been found in the selection of piezoelectric materials and the direction of wave propagation in earlier studies on surface acoustic wave sensors. The primary goal of the current work is to investigate how wave propagation direction influences the performance of SAW macro- and nano-sensors in an effort to remove such barriers in the technological revolution of SAW sensors. A proposed model is established to study Shear Horizontal (SH) and anti-plane SH wave propagation in piezoelectric materials with surface effects. The theoretical forms are constructed and used to present the wavenumber of surface waves in any direction of the piezoelectric medium, based on the Extended Stroh formalism. In addition, we take into account surface elasticity theory in order to obtain the phase velocity equation based on the wavenumber expression. The model incorporates surface elasticity, piezoelectricity, and permittivity to account for nanoscale surface phenomena. Two configurations are examined: an orthotropic piezoelectric material layer over an elastic framework and a piezoelectric material half-space with a nano substrate. Analytical expressions for frequency equations are derived for both symmetric and anti-symmetric waves. Numerical results highlight the critical thickness of the piezoelectric layer, where surface energy significantly influences dispersion properties. The effects of surface elasticity and density on wave velocity are analyzed, revealing a spring force-like influence on boundaries. The research investigates SH wave transmission in anisotropic, transversely isotropic piezoelectric nanostructures. The findings could aid in designing SAW devices and piezoelectric sensors, as well as producing more effective surface acoustic wave sensors, based on recent theoretical work summaries. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2024.
Creator
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Seema; Singhal A.
Source
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Acta Mechanica
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Springer
Date
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2024-01-01
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<a href="https://doi.org/10.1007/s00707-024-04162-z" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s00707-024-04162-z</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210505648&doi=10.1007%2Fs00707-024-04162-z&partnerID=40&md5=07c6657bc0695a1a8065105dc922a278" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210505648&doi=10.1007%2fs00707-024-04162-z&partnerID=40&md5=07c6657bc0695a1a8065105dc922a278</a>
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A related resource
ISSN: 15970; CODEN: AMHCA
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Online
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English
Type
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Article
Coverage
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Seema, Christ University, Bengaluru, 560029, India; Singhal A., Christ University, Bengaluru, 560029, India
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Faculty Publications
Article
Faculty Publications -Articles
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Creator
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Seema; Singhal, Abhinav
Title
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Mechanics of SH and anti-plane SH waves in orthotropic piezoelectric quasicrystal with multiple surface effect
Date
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01-01-2025
Source
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Acta Mechanica;Volume;236;Issue;1;Article No.;106565;pp.439-456
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<a href="https://doi.org/10.1007/s00707-024-04162-z" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s00707-024-04162-z</a> <br /><br /><a href="https://www.scopus.com/pages/publications/85210505648?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/85210505648?origin=resultslist</a>
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Seema, Christ University, Bengaluru, 560029, India; Singhal A., Christ University, Bengaluru, 560029, India
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Significant restrictions have been found in the selection of piezoelectric materials and the direction of wave propagation in earlier studies on surface acoustic wave sensors. The primary goal of the current work is to investigate how wave propagation direction influences the performance of SAW macro- and nano-sensors in an effort to remove such barriers in the technological revolution of SAW sensors. A proposed model is established to study Shear Horizontal (SH) and anti-plane SH wave propagation in piezoelectric materials with surface effects. The theoretical forms are constructed and used to present the wavenumber of surface waves in any direction of the piezoelectric medium, based on the Extended Stroh formalism. In addition, we take into account surface elasticity theory in order to obtain the phase velocity equation based on the wavenumber expression. The model incorporates surface elasticity, piezoelectricity, and permittivity to account for nanoscale surface phenomena. Two configurations are examined: an orthotropic piezoelectric material layer over an elastic framework and a piezoelectric material half-space with a nano substrate. Analytical expressions for frequency equations are derived for both symmetric and anti-symmetric waves. Numerical results highlight the critical thickness of the piezoelectric layer, where surface energy significantly influences dispersion properties. The effects of surface elasticity and density on wave velocity are analyzed, revealing a spring force-like influence on boundaries. The research investigates SH wave transmission in anisotropic, transversely isotropic piezoelectric nanostructures. The findings could aid in designing SAW devices and piezoelectric sensors, as well as producing more effective surface acoustic wave sensors, based on recent theoretical work summaries. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2024.
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Springer
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ISSN: 15970; CODEN: AMHCA
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English
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Article
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online
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61000418
Title
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Mechanisms Linking Gratitude to Life Satisfaction among Adults : A Mixed - Methods Study
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Psychology
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The study examined the relationship between gratitude and life satisfaction in educated adults in an Indian context and the mediation of affect, schema and coping. The sample comprised 711 males and females (18-45 yrs). The research utilised a sequential explanatory mixed methods design, incorporating a follow-up explanation model (Creswell & Creswell, 2017). The initial quantitative phase addressed research questions concerning how the selected variables mediate the relationship between gratitude and life satisfaction. Mediation analysis revealed that positive affect and positive self/others partially mediated the relationship between gratitude and life satisfaction. There is no influence of gender in the role of gratitude in life
satisfaction. The quantitative data held significance as it served as the foundation for subsequent qualitative analysis. The two-phased data collection facilitated a comprehensive exploration of the research questions, and integrating quantitative and qualitative data provided a better understanding of the relationships under investigation. A semi-structured interview was designed in the qualitative phase, incorporating insights from the survey results. The interview questions explored participants' perceptions and experiences regarding how various factors contribute to connecting gratitude with life satisfaction. A thematic analysis was performed to recognise the themes expressed by the participants, as outlined by Braun and Clarke in 2013. Three
broader themes were derived, incorporating the 14 categories identified through coding. The three identified themes from the qualitative analysis are: 1. Life satisfaction through positive emotions; 2. Self-oriented schema promotes a sense of satisfaction, and 3. Positive connections with others enhance happiness. The qualitative data enrich our understanding by illustrating how participants who prioritise others' well-being and maintain meaningful social connections experience enhanced happiness. The quantitative findings are reinforced by the qualitative insights, which highlight that positive emotions serve as an emotional bridge that connects the feelings of gratitude to an overall sense of happiness, enhancing life satisfaction. This integrated approach enhances our understanding of how gratitude influences emotional well-being, ultimately contributing to overall life satisfaction. The identified themes of life satisfaction through positive emotions, self-oriented schema, and positive connections with others yield valuable implications. Implementing gratitude-focused interventions offers actionable steps for individuals, educators, and mental health practitioners to enhance overall well-being.
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Gupta, Simmi
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Author's Submission
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Christ(Deemed to be University)
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2024-01-01
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P, Padmakumari
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Open Access
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PDF
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English
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PhD
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<a href="http://hdl.handle.net/10603/615083" target="_blank" rel="noreferrer noopener">http://hdl.handle.net/10603/615083</a>
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Book Chapter
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Mechanisms towards enhanced quality of experience (QoE) in fog computing environments
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Architecture; Edge computing; Fog computing; Fog data analytics; Fog RAN; Internet of things; IoT; QoE; Quality of experience; Real-time applications
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The Fog or Edge computing emerges as one of the important paradigms for setting up and sustaining smarter environments across industry verticals. Our everyday environments are being meticulously advanced and accentuated through a bevy of edge and digital technologies and tools in order to be situation-aware and sophisticated. On the other side, we have powerful Cloud environments contributing as the one-stop IT solutions not only for business automation but also for people empowerment. Compared to the number of prospective Cloud environments, the number of Fog environments is going to be quite large with the availability of billions of connected devices. The scope of Fog environments, which are being touted as the most crucial for empowering people and in their everyday activities, is bound to escalate in the days to unfurl. The immediate challenge for Fog environments is to drastically enhance the quality of experience (QoE) for users. Academic professors and industry professionals have come out with a number of solution approaches and algorithms. This chapter is being specially prepared and presented in this book to tell all about the role and responsibility of Fog computing environments, the unique use cases and the various challenges, etc. Furthermore, the significance of QoE is described in detail and how that requirement can be attained by smartly applying various proven and potential technologies. This chapter also aims to motivate the readers and researchers to dig deep into this new critical requirement to unearth pioneering solutions towards enhanced QoE. Springer International Publishing AG, part of Springer Nature 2018.
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Soundarabai P.B.; Chellaiah P.R.
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Fog Computing: Concepts, Frameworks and Technologies, pp. 131-151.
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Springer International Publishing
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2018-01-01
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<a href="https://doi.org/10.1007/978-3-319-94890-4_7" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/978-3-319-94890-4_7</a>
<br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064098241&doi=10.1007%2F978-3-319-94890-4_7&partnerID=40&md5=f3114686bd21f7fe71fd2ebb6835db7d" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064098241&doi=10.1007%2f978-3-319-94890-4_7&partnerID=40&md5=f3114686bd21f7fe71fd2ebb6835db7d</a>
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ISBN: 978-331994890-4; 978-331994889-8
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Online
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English
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Book chapter
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Soundarabai P.B., CHRIST Deemed to be University, Bangalore, India; Chellaiah P.R., Reliance Jio Cloud Services (JCS), Bangalore, India
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Faculty Publications
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Avala, Priyanka; Kumar, Malavika S; Das, Avijit Kumar; Sardar, Ankan; Maity, Tilak Raj; Samanta, Aveek; Dolai, Malay
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Mechanistic elucidation of irreversible chemodosimetric sensing of hydrazine through structural, computational, and bioimaging analyses
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01-01-2026
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New Journal of Chemistry;Volume;50;Issue;1;pp.433-440
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<a href="https://doi.org/10.1039/d5nj04044b" target="_blank" rel="noreferrer noopener">https://doi.org/10.1039/d5nj04044b</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105024483937?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105024483937?origin=resultslist</a>
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Avala P., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India, Centre for Renewable Energy and Environmental Sustainability, Christ University Karnataka, 560029, India; Kumar M.S., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India, Centre for Renewable Energy and Environmental Sustainability, Christ University Karnataka, 560029, India; Das A.K., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India, Centre for Renewable Energy and Environmental Sustainability, Christ University Karnataka, 560029, India; Sardar A., Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohanpur, Kolkata, 741246, India; Maity T.R., Department of Biotechnology, Haldia Institute of Technology, Haldia Purba, West Bengal, Medinipur, 721657, India; Samanta A., Department of Botany, Prabhat Kumar College, Contai Purba Medinipur, W.B, Medinipur, 721404, India; Dolai M., Department of Chemistry, Prabhat Kumar College Purba, West Bengal, Medinipur, 721404, India
Description
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A fluorescent chemodosimeter, DBA, has been developed for the selective detection of hydrazine via an irreversible reaction pathway that leads to fluorescence enhancement. The crystal structure of the ligand has been successfully determined. The sensing mechanism involves the conversion of a hydrazide derivative into a hydrazone derivative, as confirmed by both 1H NMR and mass spectrometry. Upon interaction of DBA with hydrazine, the probe exhibits a significant decrease in absorbance at 366 nm and 279 nm, along with a three fold enhancement in fluorescence intensity at 423 nm, achieving a detection limit of 0.37 M. The detection mechanism has also been supported by theoretical analysis using density functional theory (DFT) calculations. For practical applications, DBA has been employed in plant-based cell imaging to monitor hydrazine accumulation in Lathyrus sativus L. (grass pea). Overall, DBA is a simple, effective, and promising fluorescent probe for hydrazine detection in diverse fields such as environmental monitoring, food safety, and biological risk assessment. This journal is The Royal Society of Chemistry and the Centre National de la Recherche Scientifique, 2026
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Royal Society of Chemistry
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ISSN: 11440546; CODEN: NJCHE
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English
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Article
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All Open Access; Hybrid Gold Open Access
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online
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Faculty Publications
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Das, Avijit Kumar; Kumar, Malavika S.; Mishra, Subhendu; Vishnu, S.; Salian, Raksha D.; Mathias, Royston; Singh, Abhishek Kumar; Kumbhakar, Partha
Title
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Mechanoluminescence of PolymerOrganic Composites under Strain and Hydrostatic Pressure
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01-01-2026
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ACS Applied Optical Materials;Volume;4;Issue;1;pp.36-43
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<a href="https://doi.org/10.1021/acsaom.5c00430" target="_blank" rel="noreferrer noopener">https://doi.org/10.1021/acsaom.5c00430</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105028249734?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105028249734?origin=resultslist</a>
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Das A.K., Department of Chemistry, Christ University, Bangalore, 560029, India; Kumar M.S., Department of Chemistry, Christ University, Bangalore, 560029, India; Mishra S., Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India; Vishnu S., Department of Chemistry, Christ University, Bangalore, 560029, India; Salian R.D., Department of Physics and Electronics, Christ University, Bangalore, 560029, India; Mathias R., Department of Physics and Electronics, Christ University, Bangalore, 560029, India; Singh A.K., Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India; Kumbhakar P., Department of Physics and Electronics, Christ University, Bangalore, 560029, India
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The development of underwater-based Internet of Things has drawn much attention to fluorescence sensors for crucial technological advancement. Therefore, the technologies for underwater mechanoluminescence (ML) sensing have created various applications for sensors and self-powered waterproof displays. However, developing single-molecule-based intrinsically adaptive materials capable of responding to multiple stimuli with high sensitivity remains a challenge. Herein, a flexible sensor based on the fluorescent ligand DHN was fabricated using a PVDF polymer matrix to form PVDH, enabling the exploration of external-stimuli-responsive fluorescence enhancement under mechanical strain and underwater pressure. For PVDH, the transition from crystalline to amorphous state by mechanical stimuli boosted its photoluminescence by ?75%, and stretching (strain ?16%) the sensor boosted its photoluminescence by ?145%, which is due to the formation of molecular aggregates in the amorphous state. Additionally, the increase in ML correlated with an output voltage of ?4 V of the fabricated device under mechanical stress. The in-depth density functional theory (DFT) calculations further support the experimental observation by studying the charge distribution and orbital overlapping in the DHN ligand. Furthermore, the film shows clear visualization when subject to underwater pressure and stable fluorescence upon exposure to different impurities. Therefore, this study reveals the use of fluorescence and mechanochromic properties of the ligand for designing advanced underwater sensors for visualization and communication. 2025 American Chemical Society
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DFT; energy generation; fluorescence; mechanoluminescence; underwater fluorescence
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American Chemical Society
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ISSN: 27719855;
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English
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Article
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Restricted Access; Hardcopy may be available in the library
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online