A progressive interlaminar damage model, based on the Northwestern University theory and a trapezoidal trilinear traction-separation law, is presented to predict the initiation and propagation of delamination in layered composites under Mode I and Mode II loadings. The capability and reliability of the damage model proposed is assessed by comparing its results with experimental data. It was found that the model was able to accurately predict the maximum load and postfailure behavior of composite laminates. The model proposed was also compared with the Abaqus inbuilt cohesive surface model, which is also based on a bilinear tractionseparation law, and our model was found to give more accurate results.

中文翻译：

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复合材料层压板在 I 型和 II 型载荷下逐渐分层的数值模拟

提出了一种基于西北大学理论和梯形三线牵引-分离定律的渐进层间损伤模型，用于预测在模式 I 和模式 II 载荷下层状复合材料中分层的发生和传播。通过将其结果与实验数据进行比较来评估所提出的损伤模型的能力和可靠性。结果表明，该模型能够准确预测复合材料层压板的最大载荷和失效后行为。所提出的模型还与同样基于双线性牵引分离定律的 Abaqus 内置粘性表面模型进行了比较，发现我们的模型给出了更准确的结果。