ANALYSIS ON BUCKLING AND POSTBUCKLING OF DELAMINATION IN 3D COMPOSITES

查看全文 作　　者：Li Siping**;Huang Yuying;Hu Yuantai;Zhong Weifang, Huazhong University of Science and Technology, Wuhan 430074, China Doctoral candidate from Zhengzhou University of Technology, Zhengzhou 450002, China. 出　　处：《Acta Mechanica Solida Sinica》索引1997年第10卷第3期,共8页 基　　金：The project supported by post doctoral science foundation of China 摘　　要：In this paper, the problem of axisymmetric buckling and postbuckling of a circular thin-film delamination bridged by through-thickness fiber tows in 3D composites is presented. An iterativeprocedure based on Taylor’s series expansion is used to generate a family of nondimensionalized post-buckling solutions of the above problem by yon Karman’s nonlinear plate theory. Attention is fo-cused, herein, on the effects of the bridge force of through-thickness fibers on the buckling and post-buckling behavior of the delamination. It is found that fiber bridge not only increases the ability of re-sisting delamination buckling and postbuckling, but also brings on the jump of the delamination deflec-tion mode during the postbuckling phase. Consequently the behavior of the composite structure with de-lamination is greatly improved, such as increasing the residual strength and prolonging the service life. 关 键 词：3D COMPOSITES DELAMINATION BUCKLING POSTBUCKLING FIBER BRIDGE