加载和卸载过程中复合材料叠层圆柱曲板后屈曲路径的研究

A Study of the Postbuckling Path of Cylindricaily Curved Panels of Laminated Composite Materials during Loading and Unloading

本文用动态松弛法研究了在加载和卸载过程中复合材料叠层圆柱曲板的后屈曲路径,发现了加载路径与卸载路径不重合的现象,给出了在均匀单轴压力作用下的十字叠层圆柱曲板在两种边界条件下的数值结果,并讨论了层数、曲率半径、初始几何缺陷等因素对后屈曲路径的影响.

In this paper, Dynamic Relaxation Method is applied to study the postbuckling path of cyliridrically curved panels of laminated composite materials during loading and unloading. The phenomenon that loading paths do not coincide with unloading paths has been found. Numerical results are given for cylindricaily curved cross-ply panels subjected to uniform uniaxial compression under two types of boundary conditions. The influence of the number of layers, the panels curvature and the initial imperfection on the postbuckling paths is discussed.