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APPLICATION AND THEORETICAL ANALYSIS OF C/SiC COMPOSITES BASED ON CONTINUUM DAMAGE MECHANICS
Authors:Yanjun Chang  Guiqiong Jiao  Keshi Zhang  Bo Wang  Jiannwen Ju
Institution:1. College of Civil Engineering & Architecture, Guangxi University, Nanning 530004, China;2. School of Mechanics and Civil Construction, Northwestern Polytechnical University, Xi''an 710072, China;3. Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA;1. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;2. Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA;1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China;2. College of Aerospace Engineering, Chongqing University, Chongqing 400030, China;3. Institute for Structure and Function, Chongqing University, 401331, China;1. AMADE, Polytechnic School, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain;2. IK4-IKERLAN, PJM Arizmendiarrieta, 2, Arrasate-Mondragón, 20500 Gipuzkoa, Spain;3. AIRBUS OPERATIONS SAS, 316, Route de Bayonne, 31060 Toulouse Cedex 03, France;4. AIRBUS Operations GmbH, Kreetslag 10, 21129 Hamburg, Germany
Abstract:Based on the thermodynamic theory, an orthotropic damage constitutive model was developed to describe the nonlinear mechanical behavior of C/SiC composites. The different nonlinear kinematic and isotropic hardening functions were adopted to describe accurately the damage evolution processes. The damage variables were defined with the damaged modulus and the initial undamaged modulus on energy equivalence principle. The initial orthotropy and damage coupling were presented in the damage yield function. Tensile and in-plane shear loading and unloading tests were performed, and a good agreement between the model and the experimental results was achieved.
Keywords:orthotropic damage constitutive model  C/SiC composites  damage unrecoverablestrain  damage isotropic hardening  damage kinematic hardening
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