复合材料格栅加筋板的分层扩展特性  

Delamination growth characteristics for composite grid stiffened plates

作　　者：王蔓[1] 李泽成[1] 白瑞祥[1] 

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

出　　处：《吉林大学学报（工学版）》2007年第1期229-233,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金资助项目(10302004)

摘　　要：采用有限元方法对低速冲击后蒙皮内含有不同分层形式的复合材料格栅加筋(AGS)板的分层扩展行为进行了数值模拟。采用虚裂纹闭合技术计算分层前缘的总能量释放率,并以总能量释放率准则作为分层扩展判据,结合自适应网格移动技术,分别研究了在压缩载荷作用下,蒙皮内具有圆形和椭圆形分层的复合材料格栅加筋板的分层扩展过程。数值研究结果表明:分层深度的变化导致了AGS的分层扩展特性十分复杂,它与分层深度、初始分层尺寸、蒙皮和肋骨的刚度比、后屈曲变形模式等因素都密切相关。本文结论对AGS的承载能力预测及优化设计具有一定的参考价值。A finite element numerical method was developed for studying the delamination growth of composite grid stiffened plates with embedded delamination in the skin. The total energy release rate was used as the criteria of delamination growth, and a virtual crack closure technique （VCCT） combined with a self-adaptive grid moving technology was adopted. Numerical examples show that the delamination growth behavior of composite grid stiffened plates is very complicated, related with the delamination depth, the delamination configuration and size, the ratio of rib＇s stiffness to that of skin and postbuckling model. The conclusion provided a valuable guide for estimating load capability and optimal design of composite advanced grid stiffened structures.

关 键 词：工程力学 格栅加筋结构 后屈曲 分层扩展 复合材料 

分 类 号：TB330.1[一般工业技术—材料科学与工程] V214.8[航空宇航科学与技术—航空宇航推进理论与工程]