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含椭圆分层损伤复合材料层合板分层前缘接触效应研究

, PP. 105-109

Keywords: 非线性,有限元法,屈曲,分层损伤

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Abstract:

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。

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