一种求解层合圆柱壳的杂交应力单元

A New Hybrid Stress Element Analysis for Composite Laminated Cylindrical Shell

根据修正的余能原理，推导出一种求解复合材料层合圆柱壳的杂交应力单元。取用六面体等参单元，此单元反映了各层材料性质不同及应力分布沿整个厚度不连续现象，同时计入横向剪切变形和法向挤压变形，适用于厚层壳体。文章通过实例说明此单元能准确求出各层内的应力值，实用价值高。

Based on the modified principle of complementary energy, a new hybrid stress element is formulated for composite laminated cylindrical shell. The element has shape of six sides body, and it reflects the difference of material between layers and non continuous phenomenon of some stress and strain along the thickness of shell. Because of including transverse shear strains and normal strain, the element can be adopted for composite laminated cylindrical thick shell. Numerical results show that the element proposed is of higher precision for analysis of stresses and between layers, and is reliable and simple for application.