具有夹层的正交异性复合材料圆锥壳体的非线性轴对称屈曲分析

研究均布载荷作用下边缘可移夹支具有正交异性复合材料表层和软夹心的夹层圆锥壳非线性轴对称屈曲问题.利用变分原理导出具有正交各向异性表层夹层圆锥壳在均匀外压作用下的非线性轴对称屈曲问题的基本方程,采用修正迭代法8]求得了可移夹支边界条件下壳体临界屈曲载荷的解析表达式,对几种典型的纤维增强复合材料表层夹层圆锥壳给出了数值结果和图表,讨论了几何参数和物理参数对临界屈曲载荷的影响。

NONLINEAR AXISYMMETRIC BUCKLING OF CONICAL SANDWICH SHELLS WITH ORTHOTROPIC SKINS

This paper deals with the problem of nonlinear axisymmetric buckling for a conical sandwich shell which is composed of orthotropic composite skins and a soft core under the action of uniform pressure. The fundamental equations of the nonlinear stability for conical sandwich shells are derived by means of calculus of variations . An analytic solution for the critical buckling pressure is obtained by use of modified iteration method . Numerical results are obtained for conical sandwich shells with three types of fiber-reinforced composite skins. The effects of geometric and physical parameters on buckling behavior are illustrated and discussed.