Cohesive zone models coupling interface damage and friction have been developed in the literature and are available in the commercial finite element package ABAQUS to consider the enhancing effect of through-thickness compression on interfacial fracture resistance. It is revealed in this paper that these models are extremely dependent on interface stiffness, because interface stiffness reduction factor is used to combine damage and friction in these models. The interfacial constitutive law converges but only when the interface is extremely stiff and an unrealistic evolution of the interface damage is produced. A new approach is then developed which uses a cohesive energy related parameter to combine interface damage and friction. The behaviour of the new coupled model is independent of the interface stiffness once the interface is moderately stiff. The new and existing damage/friction coupled models have been employed to simulate the shear failure of a composite specimen and the predictions are compared against the experimental data in the literature. The new model produces converged results over a wide range of interface stiffness and the predictions match the experiments quite well, better than the existing models.

结合界面损伤和摩擦的内聚力区域模型已经在文献中开发出来，并且可以在商业有限元软件包ABAQUS中使用，以考虑全厚度压缩对界面断裂阻力的增强作用。本文揭示了这些模型非常依赖于界面刚度，因为在这些模型中界面刚度降低因子用于组合损伤和摩擦。界面本构定律收敛，但仅在界面极其僵硬且界面损伤产生不切实际的演变时才收敛。然后，开发出一种新方法，该方法使用与内聚能相关的参数来组合界面损伤和摩擦。界面刚度适中后，新耦合模型的行为便与界面刚度无关。已使用新的和现有的损伤/摩擦耦合模型来模拟复合材料试样的剪切破坏，并将预测结果与文献中的实验数据进行了比较。新模型在广泛的界面刚度范围内产生收敛的结果，并且预测与实验非常吻合，优于现有模型。