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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 ,设计者可提高含损复合材料夹层板的抗屈曲能力 .
Based on the Zig Zag model and the Mindlin first-order shear theory, a finite element method for buckling analysis of composite sandwich panels with surface plates and core delamination considering the effect of bridging is presented. The uniaxial compression with layered composite As an example, the effects of bridge stiffness, laying angle and damaged zone size on the buckling characteristics of composite sandwich panels are discussed.By discussing the parameters of typical examples, it is found that when the bridge stiffness reaches a certain value, The buckling critical force and modal jump of the material sandwich plate, in which the transition from the local buckling to the mixed buckling mode, the maximum jump of the critical force, so if the rational use of bridging stiffness, designers can improve the loss-containing composite Anti-buckling capacity of material sandwich panels.