具脱层复合材料层合圆柱壳的屈曲分析

研究了具有环向贯穿脱层圆柱壳的屈曲问题．首先基于Donnell薄壳理论和初始后屈曲理论的相邻平衡准则，建立了复合材料脱层圆柱壳的屈曲微分方程以及相应的边界条件、位移连续条件和力平衡条件．然后采用分离变量法对方程求解，讨论了脱层大小、深度、位置以及复合材料纤维铺层方向对脱层圆柱壳屈曲载荷的影响．结果表明：脱层长度越大、越靠近壳的外表和壳的轴向中心，结构的屈曲载荷越低；另外，对复合材料脱层壳而言，纤维铺层方向对结构屈曲载荷的影响也较大．

Buckling Analysis of Composite Laminated Cylindrical Shell with Delamination

The buckling analysis of cylindrical shell with throughout circumference delamination was investigated. Based on Donnell thin shell theory and the adjacent equilibrium criterion of initial postbuckling theory, the basic buckling equations for composite laminated cylindrical shell were founded, and the boundary conditions, the continuous conditions of displacements and the equilibrium conditions of the force were determined. The equations were solved by adopting the separated variable method. The effects of sizes, depths, positions of the delamination, and the laminate stacking sequence on the buckling loads, were discussed. The results showed that the buckling load of shell decreased when the delamination length increased and the delamination position was nearer to the surface and the axial center of the shell. For composite delaminated shell, the effect of its stacking sequence on the buckling load was also visible.