单向碳纤维增强环氧基复合物中纤维破坏的荷载传递微观机制:第三部分复合性能的多尺度再现

Micromechanisms of Load Transfer in a Unidirectional Carbon Fibre-Reinforced Epoxy Composite due to Fibre Failures: Part 3. Multiscale Reconstruction of Composite Behaviour

第三部分介绍了多尺度再现方法。该方法考虑了与复合物退化相关的非常重要的微观现象,包括纤维的断裂、界面剥离、纤维之间的超负荷以及模具的黏弹性性能。分析结果用以精确预测单向碳纤维增强环氧基复合物中纤维的宏观破坏以及量化相同材料压力容器中的损伤累积。该方法还介绍了由于纤维的破坏形成的声发散行为,以及如何预测压力容器的残余寿命。

This third article describes a multiscale process which takes into account the most important microscopic phenomena associated with composite degradation, including fibre fractures and interfacial debonding, overloading of fibres neighbouring a fibre break as well as viscoelastic behaviour of the matrix. The results have been used to accurately predict the macroscopic failure of unidirectional carbon fibre-reinforced epoxy and quantify damage accumulation in pressure vessels made of the same material. The approach described has allowed the acoustic emission activity resulting from fibres breaks to be evaluated and shown how the residual lifetimes of such vessels, when under pressurise, can be predicted.