【摘要】 本文对（３０４／－３０４）ｓ和（４５４／－４５４）ｓ碳／环氧复合材料层板中的典型损伤状态进行了实验观察和分析。采用准三维有限元模型对引起分层损伤产生和扩展的自由边层间应力以及应变能释放率的特点进行了分析和讨论。结果表明对于角交复合材料层极，损伤的主要形式是层间界面的分层以及角度铺层内的基体裂纹。分层损伤产生的位置与层间应力的分布趋势相一致。本文提出的刚度标定法可以用以应变能释放率的实验标定。更多还原

【Abstract】 Characteristic damage states in (304/-304 )s and (454/-454)s composite laminates are investigated. Interlaminar stress and strain energy release rate which drive delamination initiation and growth in the laminates are analyzed with quasi-three-dimensional finite element model. The results indicate that the major damage modes are delamination between plies and matrix cracking in plies for angle-ply composite laminates. The locations where dalamination develops are consistent with distributions of inter laminar stresses.更多还原