具脱层的正交各向异性梁-板的屈曲分析

根据非线性理论,假定脱层为贯穿梁幅的一维脱层,且脱层位置任意,建立了轴向压力作用下含脱层的正交各向异性梁－板的非线性控制方程,对结构进行了分区处理,通过使控制方程适当线性化,利用脱层前缘的连续性条件、平衡条件及相容条件,导出了夹支边界情况下的具脱层的正交各向异性梁－板关于屈曲荷载的无量纲化的特征方程,确定了临界压力荷载,并讨论了脱层尺寸及位置对临界荷载的影响。

Buckling Analysis of Orthotropic Beam-plates with a Single Delamination

According to nonlinear theory,assuming the delamination to be one dimensional model across the width and the position to be arbitrary,the nonlinear governing equations of orthotropic beam plates with a single delamination under axial load is estabilshed.The whole structure is divided into four parts and the nondimensional characterstic equation about critical load is derived by performing proper linearization and by using the continuity,equilibrium and compatibility conditions at both delaminated tips.And in this manner,the critical load is determined.The effects of various sizes and positions of the delamination on the critical load have been also disscussed and the results are compared with previously published data.