复合材料圆柱壳非线性稳定性分析中的几个基本问题

本文讨论复合材料圆柱壳在非线性失稳下的几个基本问题,即失稳时几何非线性影响、初始缺陷影响、材料物理非线性影响、横向剪切变形影响以及前屈曲变形和各种边界条件的影响等。这些因素的交互作用对失稳性能是重要而且复杂的。本文是对于这些问题的一系列研究结果的一篇综合性分析报告。

SOME BASIC PROBLEMS IN THE ANALYSIS OF INSTABILITY FOR COMPOSITE CYLINDRICAL SHELLS

In this paper some basic problems in the analysis of nonlinear instability for multilayered composite cylindrical shells are discussed. These problems are: the influence of initial imperfections and geometrical nonlinearity of shells; the effects of physical nonlinearity caused by the material nonlinearities of shear modulas; the influence of transverse shearing deformation and the effect of prebuckling deformations on buckling and postbuckling behavior of laminated composite cylindrical shells under various boundary conditions. All of these influences are studied under various loading conditions: e.g.axial compression, hydrostatic pressure and torsion. The interaction of these influences is an important and complicated problem.This paper is a report for the sythetic analysis of these influences that based on a series of our investigated results in the recent years.