正交叠层板横向开裂问题的研究  

STUDY OF TRANSVERSE CRACKING IN CROSS-PLY LAMINATES

作　　者：曾庆敦[1] 张宁[1] 

机构地区：[1]华南理工大学交通学院,广东广州510640

出　　处：《工程力学》2005年第5期78-82,13,共6页Engineering Mechanics

基　　金：国家自然科学基金资助项目(10372032);广东省自然科学基金资助项目(000391;031394)

摘　　要：采用有限子层剪滞模型,并结合线弹性断裂力学,首先研究了正交叠层板在受到沿0o层方向的拉伸荷载作用下,90o层中产生横向初始开裂问题。然后采用坐标变换并结合线性叠加原理,研究了90o层发生横向基体多级开裂问题。求得了与实验结果较吻合的初始破坏应变和裂纹密度,证实了分析方法的正确性和可靠性。The transverse initial-failure in cross-ply laminates loaded in 0 degree fiber direction is first studied using the shear-lag model of finite sub-layers and incorporating the linear elastic fracture mechanics. The multiple cracking in 90 degree layers is studied using the coordinate conversion and linear superposition principle. Both the initial failure strains and crack densities predicted by the present method agree with the experimental results, verifying the correctness and reliability of the present analytical method.

关 键 词：正交叠层板 横向开裂 剪滞分析 能量法 破坏应变 

分 类 号：O346.1[理学—固体力学]