Abstract:

After the expression of stress field near the tip of a crack of the k-thlaminated plate of the composite laminate is substituted into Tsai-Hill Criterion，a formula of evaluating the plastic zone size factor near the tip of a crack of, the k-th laminated plate of the composite laminate is obtained in this paper. Hence, its plastic zone size can be determined，which makes it possible to apply Fracture Mechanics Criterion to the composite laminate.