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为了研究复合材料层间损伤,建立了一种新型零厚度界面单元模型,可以准确预测复合材料低速冲击与冲击后压缩过程中的分层损伤.模型包括本构关系建立、损伤准则和损伤演化引入,并在大型商用有限元软件ABAQUS用户单元子程序VUEL中实现.层内使用三维实体单元,采用三维Hashin准则作为纤维与基体损伤的判据,并在用户子程序VUSDFLD中实现.将该模型应用于国产碳纤维增强树脂基复合材料(CCF300/5428)低速冲击与冲击后压缩的模拟分析中.结果表明:此方法能够准确预测复合材料低速冲击与冲击后压缩过程中的损伤,为复合材料低速冲击损伤分析提供了一种有效的方法.
In order to study the interlaminar damage of composite materials, a new model of zero thickness interface element is established, which can accurately predict the delamination damage during the low speed impact and post-impact compression process.The model includes the establishment of constitutive relation, the damage criterion and the introduction of damage evolution , And implemented in the ABAQUS user unit subroutine VUEL, a large-scale commercial finite element software.Using three-dimensional solid element in the layer and 3D Hashin criterion as the criterion of fiber and matrix damage, this algorithm is implemented in the user subroutine VUSDFLD The results show that this method can accurately predict the damage of low velocity impact and post compression impact compression of composites, which is the result of low velocity impact and low velocity impact of composites Damage analysis provides an effective method.