TY - JOUR
T1 - A multiscale elasto-plastic damage model for the nonlinear behavior of 3D braided composites
AU - He, Chunwang
AU - Ge, Jingran
AU - Qi, Dexing
AU - Gao, Jiaying
AU - Chen, Yanfei
AU - Liang, Jun
AU - Fang, Daining
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/2/8
Y1 - 2019/2/8
N2 - 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.
AB - 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.
KW - A. Polymer-matrix composites (PMCs)
KW - B. Stress/strain curves
KW - C. Damage mechanics
KW - C. Finite element analysis (FEA)
KW - C. Multiscale modeling
UR - https://www.scopus.com/pages/publications/85058086233
U2 - 10.1016/j.compscitech.2018.12.003
DO - 10.1016/j.compscitech.2018.12.003
M3 - Article
AN - SCOPUS:85058086233
SN - 0266-3538
VL - 171
SP - 21
EP - 33
JO - Composites Science and Technology
JF - Composites Science and Technology
ER -