正交叠层板横向初始开裂问题的研究  

Investigation into the Transverse Initial 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：《华南理工大学学报（自然科学版）》2004年第7期60-64,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (10 372 0 32 ) ;广东省自然科学基金资助项目 (0 0 0 391;0 31394 )

摘　　要：建立一种分层剪滞模型 ,并结合线弹性断裂力学 ,研究了正交叠层板在受到沿 0°层方向的拉伸荷载作用下 ,90°层中产生横向基体开裂的破坏问题 .同时求得了计及固化残余热效应影响的初始破坏应变 ,计算结果和现有实验与有限元结果吻合较好 .本文中所提出的模型和方法为纤维增强复合材料叠层板的破坏分析提供了一种新的研究途径 ,所得结果也为进一步分析叠层板的多级破坏和最终破坏等问题提供了理论依据 .The transverse initial cracking of the cross-ply laminates in 90° ply by the action of the tensile loads in 0° ply direction was studied by establishing a layering shear-lag model conjunct with the linear elastic fracture mechanics.The initial failure strains resulting from the thermally residual effect were then obtained.The calculated results are in a good agreement with those of the existing experiments and those obtained by finite element me-thod.The proposed model and methods supply a new way to carry out the failure analysis of fiber-reinforced composite laminate,and the obtained results provide a theoretical basis for the further analysis of the multiple failure and ultimate fracture of laminates.

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]