含分层损伤复合材料层合板分层扩展研究  

DEL-AMINATION GROWTH IN COMPOSITE LAMINATES

作　　者：孙先念[1] 陈浩然[1] 苏长健 刘相斌 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116023

出　　处：《力学学报》2000年第2期223-232,共10页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金!19672014;国家高等学校博士学科点专项科研基金!960141

摘　　要：采用基于Ｍｉｎｄｌｉｎ一阶剪切理论的四节点板单元，分析了含椭圆分层复合材料层合板分层扩展行为．利用虚裂纹闭合技术计算分层前缘处的总能量释放率，并采用总能量释放率准则作为分层扩展准则：结合自适应网格移动技术，并考虑了分层前缘闭合接触效应，对复合材料层合板的分层扩展行为进行了模拟分析．结果表明，初始分层形状对其扩展方式有很大影响．Under compressive load, delaminated composite plates may undergo postbuckling that can lead to delamination growth. The Mindlin plate finite element is used to analysis delamination growth in composite laminates with an elliptical delamination. The total strain energy release rate, which is used as the criteria of delamination growth, is calculated with the aid of the virtual crack closure technology (VCCT). The delamination growth behavior is modeled with self-adaptive grid moving technology and considering contact effect at the delamination front. The main issue concerns the effect of the delamination shape and the boundary condition on the delamination growth behavior. The results show that the delamination growth behavior is affected significantly by the shape of delamination.

关 键 词：分层损伤 分层扩展 复合材料 层含板 

分 类 号：TB330.1[一般工业技术—材料科学与工程]