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 iterative procedure based on Taylor's series expansion is used to generate a family of nondimensionalized postbuckling solutions of the above problem by von Karman's nonlinear plate theory. Attention is focused, herein, on the effects of the bridge force of through-thickness fibers on the buckling and postbuckling behavior of the delamination. It is found that fiber bridge not only increases the ability of resisting delamination buckling and postbuckling, but also brings on the jump of the delamination deflection mode during the postbuckling phase. Consequently the behavior of the composite structure with delamination is greatly improved, such as increasing the residual strength and prolonging the service life.
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 iterative procedure based on Taylor's series expansion is used to generate a family of nondimensionalized postbuckling solutions of the above problem by von Karman's nonlinear plate theory. Attention is focused, herein, on the effects of the bridge force of through-thickness fibers on the buckling and postbuckling behavior of the delamination. It is found that fiber bridge not only increases the ability of resisting delamination buckling and postbuckling, but also brings on the jump of the delamination deflection mode during the postbuckling phase. Consequently the behavior of the composite structure with delamination is greatly improved, such as increasing the residual strength and prolonging the service life.
基金
The project supported by post doctoral science foundation of China
