考虑桥联影响的含分层损伤复合材料夹层板屈曲分析

基于Zig-Zag模型和Mindlin一阶剪切理论，给出考虑桥联影响的具有表板与芯体分层的复合材料夹层板屈曲分析有限元方法，并以单向受压下含分层复合材料夹层板为例，讨论了桥联刚度、铺设角、损伤区大小对复合材料夹层板屈曲特性的影响。通过典型算例的参数讨论发现，当桥联刚度达到某一特定值时，含损复合材料夹层板的屈曲临界力和模态出现跳跃，其中由局部失稳转为混合失稳模态时，其临界力的跳跃幅度最大，故若合理利用桥联刚度，设计可提高含损复合材料夹层板的抗屈曲能力。

Buckling analysis of delaminated composite sandwich plates with bridging

On the basis of the Zig Zag deformation model and the first shear deformation laminated plate theory, a finite element buckling analysis for the delaminated composite sandwich plates with bridging is developed.The effect of bridging stiffness, plied angles and damaged areas upon buckling behavior for the delaminated composite sandwich plates under the mono axial compressive loading are discussed.From some typical examples,it can be seen that,the effects of bridging on buckling behavior for the plates are significant,and a sudden change of the critical load and the corresponding buckling mode would happen at the plate with a specific value of the bridging stiffness.However,the largest changing for the critical load would occurs at a specific value of the bridging stiffness altering the buckling mode from local to mixed one.Hence,the loaded capability of the delaminated composite sandwich plates could be improved using a reasonable bridging stiffness along the delaminated interface between the face and core for the delaminated composite sandwich plates.