The interdependence of hygrothermal processes and elasto-viscoplastic behavior in polymer-dominated multi-material systems |
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| Affiliation: | 1. Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran;2. Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran;3. Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran;4. Faculty of Mechanical Engineering, Semnan University, Semnan, Iran;5. Department of Mechanical Engineering, Sirjan University of Technology, Sirjan, Iran;1. School of Mechanical Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Chennai 600119, India;2. Department of Bio-Technology Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Chennai 600119, India;1. Ministry of Education Key Laboratory of Functional Textile Material and Product, Xi''an Polytechnic University, Xi''an, Shaanxi 710048, China;2. Ministry of Education Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China;1. Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, 15121 Alessandria, Italy;2. Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy;3. AVANZARE Innovacion Tecnologica S.L., 26370 Navarrete, La Rioja, Spain;4. Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, 10129 Torino, Italy;5. Istituto Italiano di Tecnologia, 10129 Torino, Italy;1. College of Aerospace Engineering, Chongqing University, Chongqing 400044, PR China;2. Institute of Solid Mechanics, Beihang University, Beijing 100191, PR China;3. School of Astronautics, Beihang University, Beijing 100191, PR China |
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| Abstract: | An analytical numerical method was developed to predict the time-dependent mechanical behavior of polymer-dominated multi-material systems. The method takes into account the interdependence of stress, strain, moisture diffusion and heat conduction, and it provides stress, strain, moisture and temperature distributions through the system as functions of time, when the external hygrothermal-mechanical conditions are given. In addition it requires the input of empirical stress-strain-time relationships as well as stress-diffusion coupling coefficients. Following experimental evaluation of the necessary coefficients a set of nonlinear coupled differential equations is solved numerically by the finite strip method, which was found to be efficient and accurate for the purpose.The experimental results of the deformation behavior and moisture concentration in an asymmetrical Epoxy-Aluminum model exposed to different hygrothermomechanical histories show a good correlation with analytical prediction. |
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