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基于平纹机织复合材料的细观结构单胞模型,考虑其制备过程中产生的孔隙缺陷为随机分布的特征,通过引入两参数Weibull分布函数,应用Python语言实现了ABAQUS的二次开发,并采用Linde等提出的失效准则,建立了含孔隙缺陷平纹机织复合材料的渐进损伤模型,利用有限元数值方法模拟了其拉伸应力-应变行为,针对该模型,讨论了孔隙缺陷对材料拉伸应力-应变行为的影响,并阐述了该平纹机织复合材料单胞模型在经向拉伸载荷作用下其纤维束的损伤及演化过程。结果表明,该模型给出的数值模拟结果与实验数据吻合较好,证明了模型的有效性,为该类材料的优化设计及其力学性能分析提供了一种有效方法。
Based on the mesostructural unit cell model of plain weave composites, taking into account the random distribution of pore defects during the preparation process, the secondary development of ABAQUS was implemented by using the two-parameter Weibull distribution function and the Python language. Linde et al. Established a progressive damage model of porous plain weave woven composites. The tensile stress-strain behavior of the composites was modeled by finite element method. For the model, the effects of pore defects on the tensile stress - Strain Behavior. The damage and evolution of fiber bundles under the tensile load of the plain weaving composite cell model are described. The results show that the numerical simulation results given by the model are in good agreement with the experimental data, which proves the validity of the model and provides an effective method for the optimization design and mechanical properties analysis of such materials.