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A study on the failure behavior and mechanical properties of unidirectional fiber reinforced thermosetting and thermoplastic composites

机译：单向纤维增强热固性和热塑性复合材料的破坏行为和力学性能的研究

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Failure behavior and mechanical properties of unidirectional (UD) carbon fiber reinforced polyamide 6 (CF/PA6) and epoxy resin (CF/Epoxy) laminates were investigated through tensile tests in this study. The fracture modes of both CF/PA6 and CF/Epoxy were discussed based on the fiber orientation, interfacial properties, Mode II interlaminar fracture toughness and the brush width. Meanwhile, Global load sharing (GLS) model was employed to compare with the experimental mechanical properties and corresponding fracture mechanics model was employed to analyze the fracture behavior. The results showed that UD CF/PA6 laminates with weak interface but high Mode II interlaminalr fracture toughness mainly exhibited step-like fracture modes (77%) in interfacial fracture mode (Adhesive failure), while CF/Epoxy laminates with stronger interface but lower Mode II interlaminalr fracture toughness mostly showed splitting fracture mode (69%) in matrix fracture mode (Cohesive failure). (C) 2016 Elsevier Ltd. All rights reserved.
机译：通过拉伸试验研究了单向（UD）碳纤维增强聚酰胺6（CF / PA6）和环氧树脂（CF / Epoxy）层压板的失效行为和力学性能。根据纤维的取向，界面性能，II型层间断裂韧性和电刷宽度，讨论了CF / PA6和CF /环氧的断裂方式。同时，采用全局负荷分担模型（GLS）与实验力学性能进行比较，采用相应的断裂力学模型分析断裂行为。结果表明，界面弱但模态II高的UD CF / PA6层压板在界面断裂模式下（胶粘破坏）主要表现出阶梯状断裂模式（77％），而界面强但模态低的CF /环氧层压板II层间断裂韧性主要表现为基体断裂模式（内聚破坏）的分裂断裂模式（69％）。 （C）2016 Elsevier Ltd.保留所有权利。

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