具脱层的正交铺设圆柱壳的轴对称屈曲分析

Axisymmetrical Buckling Analysis of Cross-ply Cylindrical Shell with Delamination

脱层是复合材料最常见的损伤之一,它将导致结构提前失效.本文应用模态分析法研究了具环向贯穿脱层圆柱壳的轴对称屈曲问题.基于线弹性理论,建立了正交铺设脱层圆柱壳的轴对称屈曲微分方程、边界条件、位移连续条件、弯矩与剪力的平衡条件及相容条件.对方程进行求解,得到了脱层长度和深度对屈曲载荷的影响,并通过算例与已有文献进行了比较.

Delamination is one of the most common damages in composites. It can make structures fail prematurely. This paper analyzed the axisymmetrical buckling of cylindrical shell with throughout circumference delamination by using modal analysis method. Based on linear elastic theory, we established the axisymmetrical buckling equations for cross-ply cylindrical shell, the boundary conditions, the continuous conditions of displacements, the equilibrium conditions of the shearing force and moment, and the compatible condition. The equations were solved, and the effects of sizes and depth of delamination on the buckling loads were obtained. The present results were compared with available data.