缝合复合材料层合板的层间细观应力分析  

MICROSCOPIC INTERLAMINAR STRESS ANALYSIS OF STITCHED COMPOSITE LAMINATES

作　　者：金春花[1] 周光明[2] 

机构地区：[1]南通大学建筑工程学院,南通224019 [2]南京航空航天大学航空宇航学院,南京210016

出　　处：《玻璃纤维》2008年第6期13-16,21,共5页Fiber Glass

基　　金：江苏省自然科学基金资助项目(BK2006724);国家自然科学基金资助项目(10772026)

摘　　要：介绍了缝合复合材料代表体单元(RVE)的三维细观有限元分析模型,模型考虑了缝线的实际形状以及缝合对层合板面内纤维的影响。在分析中引入了保证胞单元边界面的应力和位移周期性连续的边界条件。着重分析了三种平均应力状态下不同角度铺层间层间应力的分布情况。研究结果表明:缝合复合材料单胞内部层间应力分布也是不均匀的;促使材料发生分层破坏的主要层间应力和外载荷有关。A 3D meso RVE FE model for stitched composite laminates is presented in this paper. The true shape of stitching fibers and the influence of stitch on the in-plane fibers are considered, and unified boundary conditions are introduced in the analysis to guarantee the continuity of displacements and stresses on all RVE＇s boundaries. Study is focused on the distribution of interlaminar stresses between different layers under three loading cases. Numerical results indicate that the distribution of interlaminar stresses in the RVE is non-uniform, and the main interlaminar stress that causes the delamination of the stitched laminates depends on the applied loads .

关 键 词：缝合复合材料 层间应力 有限元法 

分 类 号：TQ171.9[化学工程—玻璃工业]