衝撃外圧力を受ける複合材料積層円筒殻の動的安定性

概要

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Because of their high specific strength and stiffness, fiber-reinforced plastics have been used as structural members in various fields, and hence analysis of thin laminated structures is important. In this paper, the problem of dynamic stability of cross-ply laminated cylindrical shells under impact external pressure is described. First of all. the motion of cylindrical shells under impact external pressure is defined as axially symmetric motion. Following this definition, certain perturbations are superimposed on this motion and their effect on the behavior of the shell is investigated. The symmetric state of motion of the shell is called stable if the perturbations remind bounded. The solutions for the prebuckling motion and the perturbed motion are obtained using the Galerkin's method. Stable regions are examined by utilizing the Mathieu's equation. The inevitability of dynamically unstable behaviors is proved analytically and the effects of various factors, such as external pressure ratio, number of layers, lamination constitution, dynamic unstable mode and dimensions of the cylinder, are clarified.
一般社団法人日本機械学会の論文
1999-09-25