含对称穿透分层损伤复合材料层合板准三维分析

Quasi 3\|D analysis of composite laminates with symmetric through\|the\|width delaminations

采用以准三维模型为基础的非线性有限元，研究了具有对称穿透分层损伤的复合材料层合板在均匀面内压缩载荷作用下的后屈曲变形，并结合虚裂纹闭合技术（ＶＣＣＴ），计算了分层前缘的层间能量释放率各型分量． 数值分析表明，含对称中心分层损伤斜交铺层复合材料的层合板在压缩载荷作用下，其分层扩展能量释放率与分层子板压缩方向上的刚度有关．

A quasi 3\|dimensional post buckling analysis of a symmetric angle\|ply laminate with through\|the\|width delaminations located symmetrically with respect to the laminate midplane subjected to uniform axial compression is presented. The individual and total energy release rate at the delamination front are estimated with virtual crack closure technique (VCCT). It is found that, for a symmetric angle\|ply laminate with through\|the\|width delaminations located symmetrically with respect to the laminate mid\|plane, the values of individual and total energy release rate are related to the stiffness in the direction of compression.