Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 171, Issue -, Pages 21-33Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.12.003
Keywords
Polymer-matrix composites (PMCs); Stress/strain curves; Damage mechanics; Finite element analysis (FEA); Multiscale modeling
Categories
Funding
- Beijing Natural Science Foundation [1184017]
- National Natural Science Foundation of China [11802018, 11732002]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available