Abstract
A progressive damage model including the non-linear shear behavior was developed to investigate the failure mechanisms of composite laminates. The non-linear shear response of the T300/Cycom970 lamina was derived by cyclic loading-unloading tensile tests on [+45/-45]2S laminate coupons. The strain-based Hashin type failure criteria and ply discount method were employed to predict damage initiation and propagation. The model was implemented in commercial finite element software ABAQUS by a UMAT subroutine. The tensile behavior of open-hole tension specimen was predicted with this model. A reasonable good agreement was achieved between numerical predictions and experimental results.
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