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采用基于 Mindlin一阶剪切理论的四节点板单元 ,分析了分层前缘闭合接触效应对含椭圆分层复合材料层合板前后屈曲行为的影响。通过在分层区域内引入虚杆单元来防止上、下子板发生相互重叠 ,并假设接触区内没有摩擦。结果表明 ,分层前缘的闭合接触效应受分层几何形状的影响很大 ,当椭圆分层子板的长轴与压缩载荷方向一致时 ,闭合接触效应对含分层层合板前后屈曲行为最大。
The four-node plate element based on the Mindlin first-order shear theory is used to analyze the influence of the contact closure effect of the layered front edge on the buckling behavior before and after the elliptical layered composite laminates. By introducing dummy rod elements in the stratified zone, the upper and lower daughter plates are prevented from overlapping with each other, assuming no friction in the contact zone. The results show that the closing contact effect of the layered front edge is greatly influenced by the layered geometry. When the long axis of the elliptical layered sub-panel is consistent with the compressive loading direction, the contact closure effect before and after the layered composite laminate has the largest buckling behavior .