组合荷载作用下非完善层合板后屈曲分析的半解析法

本文采用经典层合板理论，研究横向荷载作用下面内受压非完善复合材料层合板的后屈曲问题。分析中将板在横向荷载作用下产生的小挠度弯曲变形和几何缺陷视为结构的初始挠度，给出了基于摄动技术、单向DQ离散格式和Galerkin法的半解数值分析方法，可方便地分析不同边界约束（简支、固支、弹性转动约束等）层合板的后屈曲性态。文中通过算例讨论了边界约束、荷载型式、纤维铺设方式等因素层合板后屈曲行为的影响。

Post-buckling of Imperfect Laminated Plates Under In-plane Compression and Lateral Loads by a Semi-analytical Approach

Based on the classical laminated plate theory,post buckling behavior for imperfect laminated rectangular plates under combined in plane edge compression and lateral load is investigated in this paper by a proposed semi analytical approach.The lateral load is converted into an initial deflection and the intital geometrical imperfection of the plate is also taken into account.The analysis employs a perturbation technique,one dimensional differential quadrature rule and Galerkin method to determine the post buckling equilibrium paths for plates with different edge constrains.Effects of boundary condition,load pattern and laminate layer ups on the post buckling behavior are examined.