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, 可以准确地预测复合材料Ⅱ型层间分层扩展。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, 采用显示积分方法求解, 不存在收敛性问题。将该模型应用于国产碳纤维增强树脂基复合材料CCF300/5428端部缺口弯曲试验（ENF）模拟分析中, 结果表明, 此界面单元模型能够准确模拟复合材料层板Ⅱ型裂纹扩展, 为复合材料层间损伤分析提供了一种有效的方法。
A new type of zero-thickness cohesive element model is proposed to study the composite interlaminar damage, which can accurately predict the delamination propagation of mode Ⅱ problem. The model consists of constitutive relationship, damage criterion and damage evolvement. This cohesive model was implemented in the explicit integration scheme with the commercial finite element software ABAQUS using the user defined element subroutine (VUEL). The model was used to predict the delamination propagation in the end notched flexure test (ENF) of domestic carbon fiber/resin composite CCF300/5428. The result shows that this cohesive element is effective to analysis the delamination in the composite laminates.
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