Progressive failure for Carbon Fiber Reinforced Polymer (CFRP) was computationally studied and analyzed using Hashin’s failure criteria. It was an interactive failure criterion having 4 separate modes of failure. 8 layers of plies were oriented at specific stacking sequences to create different laminates with dimensions being specified using the ASTM D5766 standard. A total of 7 types of laminate were modeled and simulated to predict the failure for each type under tensile loading. A circular notch was added in the center for the concentration of stress. The damage to the fiber and matrix propagated and failed the structure. Contour plot analyses showed failure progression of fibers and matrix around the circular notch. Results show that matrix failure most predominant and critical type of failure for most laminates. From the stress vs. strain curves, it was seen that the [0/90]4 cross-ply laminate showed the highest open-hole tensile strength.

中文翻译：

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改变纤维取向的圆形缺口碳纤维增强聚合物复合材料的渐进失效分析

使用 Hashin 失效准则对碳纤维增强聚合物 (CFRP) 的渐进失效进行了计算研究和分析。这是一个交互式失效准则，具有 4 种不同的失效模式。 8 层板层按照特定的堆叠顺序定向，以创建不同的层压板，其尺寸使用 ASTM D5766 标准指定。总共对 7 种类型的层压板进行了建模和模拟，以预测每种类型在拉伸载荷下的失效情况。在中心添加圆形缺口以集中应力。纤维和基体的损伤不断扩大，导致结构失效。等值线图分析显示圆形凹口周围纤维和基质的失效进展。结果表明，基体失效是大多数层压板最主要和最关键的失效类型。从应力与应变曲线可以看出，[0/90]4 正交层压板表现出最高的开孔拉伸强度。