将复合材料细观力学桥联模型与有限元软件ABAQUS结合,用于分析层合板受低速冲击作用的极限承载能力.通过确定组分材料是否破坏来判断单层板是否破坏,对破坏后的单层实施一种常系数刚度衰减.将细观力学本构模型、针对组分材料的破坏判据以及刚度衰减模式编制成用户子程序VUMAT,为ABAQUS求解层合板的极限冲击响应提供一种自定义材料模型.只需要输入纤维和基体的材料参数、纤维体积含量等有限数据并且无须单层板的实验数据,就能顺利实施复合材料层合板结构的冲击承载能力分析.所计算的层合板的挠度-时间曲线以及横向冲击力-时间曲线与实验值吻合良好,说明本文的方法是有效的.
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