Three-dimensional analytical model for composite laminate with transverse cracks by assuming parabolic crack opening
Three-dimensional analytical model for composite laminate with transverse cracks by assuming parabolic crack opening
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DOI：
10.1080/09243046.2023.2167481
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发表时间：
2023-01
影响因子：
2.9
通讯作者：
S. Onodera;Kazuki Ryuzono;S. Yashiro;T. Okabe
中科院分区：
文献类型：
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作者：
S. Onodera;Kazuki Ryuzono;S. Yashiro;T. Okabe
基于连续损伤力学，建立了含横向裂纹复合材料层合板的三维有效柔度模型。三维层合板理论被用来再现所有的热弹性性能的损伤层合板。损伤变量，它描述了横向裂纹引起的刚度降低的程度，制定了基于三维细观力学模型，与松散的边界条件，并假设抛物线裂纹开口。这些假设有助于刚度折减模型的分析精度，同时简化了损伤变量表达式。利用所提出的模型对各种复合材料层合板的有效热机械性能进行了预测，并与有限元分析（FEA）和实验结果进行了比较。我们发现，所提出的模型与导出的损伤变量成功地再现有限元分析和损伤复合材料层合板刚度退化的实验结果。
In this study, a model for the three-dimensional effective compliance of composite laminates with transverse cracks is developed based on continuum damage mechanics. Three-dimensional laminate theory is used to reproduce all the thermoelastic properties of the damaged laminate. The damage variable, which describes the degree of stiffness reduction caused by transverse cracking, is formulated based on a three-dimensional micromechanical model, with a loose boundary condition and assuming parabolic crack opening. These assumptions contribute to the analytical accuracy of the stiffness reduction model, while simplifying the damage variable expression. The effective thermomechanical properties of various composite laminates are predicted using the proposed model and compared with finite element analysis (FEA) and experimental results. We found that the proposed model with derived damage variable successfully reproduces the FEA and experimental results of stiffness degradation of damaged composite laminates.