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- 2016
复合材料层合板缺口强度的CDM三维数值模型
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Abstract:
针对复合材料层合结构缺口强度问题，基于连续损伤力学（CDM）提出了一种三维损伤数值模型。模型区分了层内损伤（纤维失效、纤维间失效）和层间分层损伤的不同失效模式。采用三维Puck准则与Aymerich准则对上述2类损伤进行判定，材料失效后基于CDM中线性软化模型对材料损伤进行演化。模型考虑了复合材料层合板子层的就位效应和剪切非线性行为。对Carlsson的AS4/3501-6缺口拉伸强度试验进行数值模拟。结果表明：分析结果与试验结果吻合良好，证明了该模型能够准确地预测含缺口复合材料层合板面内拉伸强度。 A three-dimensional damage numerical model was proposed based on continuum damage mechanics (CDM) to deal with problem of the notched strength of composite laminates. This model was able to distinguish different failure modes of in-plane damage (fiber failure, inter fiber failure) and interlaminar delamination damage. Three-dimensional Puck criterion and Aymerich criterion were used to judge two kinds of damage above. The damage was evolved based on the linear softening model of CDM after material failure. The in-situ effect and the shear nonlinear behavior of composite laminate sublayers were considered in the model. The tensile strength of notched AS4/3501-6 laminate tested by Carlsson was numerical simulated. The results show that the analysis results are in good agreement with the test results. The analysis results prove that the present model is capable of predicting the in-plane tensile strength of notched composite laminates. 国家自然科学基金（11202098）
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