A phenomenological intra-laminar plasticity model for FRP composite materials

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Zhou, Yinhua^1 ; Hou, Chi^1 ; Wang, Wenzhi^1 ; Zhao, Meiying^1 ; Wan, Xiaopeng^1

School of Aeronautics, Northwestern Polytechnical University, Xi'an, China^1

关键词: Carbon fibre reinforced polymer;    Fibre reinforced polymer composite (FRP);    Glass fibre reinforced polymers;    Non-linear phenomena;    Numerical algorithms;    Phenomenological modeling;    Plastic potentials;    Tangent stiffness matrix;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012071/pdf
DOI  :  10.1088/1757-899X/87/1/012071

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The nonlinearity of fibre-reinforced polymer (FRP) composites have significant effects on the analysis of composite structures. This article proposes a phenomenological intralaminar plasticity model to represent the nonlinearity of FRP composite materials. Based on the model presented by Ladeveze et al., the plastic potential and hardening functions are improved to give a more rational description of phenomenological nonlinearity behavior. A four-parameter hardening model is built to capture important features of the hardening curve and consequently gives the good matching of the experiments. Within the frame of plasticity theory, the detailed constitutive model, the numerical algorithm and the derivation of the tangent stiffness matrix are presented in this study to improve model robustness. This phenomenological model achieved excellent agreement between the experimental and simulation results in element scale respectively for glass fibre-reinforced polymer (GFRP) and carbon fibre-reinforced polymer (CFRP). Moreover, the model is capable of simulating the nonlinear phenomenon of laminates, and good agreement is achieved in nearly all cases.