Numerical simulation of Failure Behaviors of CFRP laminates on Hashin model coupled with cohesive elements

The failure modes of carbon fiber reinforced composites (CFRP) was investigated in this study. A method of combination of Hashin model and cohesive elements was proposed to predict failure behaviors in T300/PR319 and AS carbon/epoxy laminates by FE model, while executing three-point bending test. The result shows that there are differences between the response of two materials during bending test. Fiber compression and matrix tension in T300/PR319 and AS carbon/epoxy appears first relatively. Subsequently delamination occurs in AS carbon/epoxy as a result of cohesive elements. A evaluating method of measuring fracture process displacement was also proposed under new damage criterion. (paper)