A multiscale elasto-plastic damage model for the nonlinear behavior of 3D braided composites

被引：158
作者：
He, Chunwang [1 ]
Ge, Jingran [1 ,2 ]
Qi, Dexing [1 ]
Gao, Jiaying [3 ]
Chen, Yanfei [1 ,2 ]
Liang, Jun [1 ,2 ]
Fang, Daining [1 ,2 ]
机构：
[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
[3] Northwestern Univ, Dept Mech Engn, 2145 Sheridan Rd, Evanston, IL 60201 USA
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2019年 / 171卷
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Polymer-matrix composites (PMCs); Stress/strain curves; Damage mechanics; Finite element analysis (FEA); Multiscale modeling; MICROMECHANICAL ANALYSIS; PROGRESSIVE DAMAGE; FAILURE; PREDICTION;
D O I：
10.1016/j.compscitech.2018.12.003
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
A multiscale elasto-plastic damage model is developed to predict the nonlinear behavior of three-dimensional (3D) braided composites. In this model, the sequential multiscale method is applied to transfer the effective properties from microscale to mesoscale, and from mesoscale to macroscale. The constituents at the microscale consist of fiber, matrix and interface which are consistent with the mesoscale ones. The fiber is considered to be elastic and brittle, and the elastic damage model is applied to degrade the stiffness. For the epoxy matrix, a coupled elasto-plastic damage model is proposed to integrate the effects of plasticity and damage, and furthermore the paraboloidal yield criterion is adopted to characterize the different types of mechanical behavior in tension and compression. The bilinear constitutive relation based on the cohesive element is used to investigate the properties of interface. A user-defined material subroutine (UMAT) in the nonlinear finite element analysis software ABAQUS is written to implement the proposed model and determine the response for 3D braided composites under quasi-static tension. The numerical simulations are compared with the corresponding experiments and the results show that they agree well with each other.
引用
收藏
页码：21 / 33
页数：13
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