Enhancement of mechanical strength by shape memory effect in TiNi fiber-reinforced composites |
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| Affiliation: | 1. Department of Mechanical Engineering, Saitama Institute of Technology 1690, Fusaiji, Okabe, Saitama 369-0293, Japan;2. Academic Affairs Department, The Japanese Society for Non-Destructive Inspection, MBR99 4th Floor, Kanda-sakumagashi, Chiyoda-ku, Tokyo 101-0026, Japan;3. Department of Mechanical and System Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan;1. Fracture Research Laboratory, Faculty of New Sciences & Technologies, University of Tehran, P.O. Box 14395-1561, Tehran, Iran;2. NTNU, Department of Engineering Design and Materials, Richard Birkelands vei 2b, 7491 Trondheim, Norway;3. Department of Industrial Engineering, University of Padova, Via Venezia, 1, 35131 Padova, Italy;4. Department of Mechanical Engineering, Faculty of Engineering, Kharazmi University, Mofatteh Avenue, P.O. Box 15719-14911, Tehran, Iran;1. School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, PR China;2. College of Mechanical and Electrical Engineering, Sichuan Agricultural University. Ya''an 625014, PR China;3. School of Engineering and Information Technology, The University of New South Wales, Canberra ACT 2600, Australia;4. School of Computing, Engineering and Mathematics, Western Sydney University, NSW 2751, Australia;1. Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, USA;2. Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology, Narmak, 16846-13114 Tehran, Iran;3. Young Researchers & Elite Club, Chalous Branch, Islamic Azad University, Chalous, Iran;1. State Key Laboratory of Structure Analysis of Industrial Equipment, Department of Engineering Mechanics, International Center for Computational Mechanics, Dalian University of Technology, Dalian 116024, PR China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong Special Administrative Region |
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| Abstract: | Since there are strong demands for materials that have the high mechanical properties, the authors developed the new design concept that improve the material strength. It uses SMA to actively control the material strength. Using the TiNi shape memory fiber-reinforced epoxy matrix composite as the test specimen, the experiment was conducted to analyze the effectiveness of the new design concept. The test was conducted by the photoelastic method. The photoelastic fringe patterns and the behavior of K-value at the crack tip clearly support the effectiveness of the new design concept. Then, an analytical model based on Eshelby’s model is developed in order to compute the average matrix compressive stress. The experimental trend that |ΔK1| increases with prestrain ϵT was in good agreement with the predictions based on the present model. |
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