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首页> 外文期刊>Composite Structures >Matrix cracking behavior of K3B/IM7 composite laments subject to static and fatigue loading
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Matrix cracking behavior of K3B/IM7 composite laments subject to static and fatigue loading

机译：K3B / IM7复合材料在静态和疲劳载荷作用下的基体开裂行为

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摘要

The matrix cracking behavior of a new high-performance thermoplastic composite material, K3B/IM7, was systematicay investgigated. Laminates in various grouped thickness and ply stacking sequences, [0_2/90_2/0_2],[0_2/90_4/0_2], and a quasi-isotropic laminate [＋45/0/-45/90]_s were tested under static and tension-tension fatigue loading. Depending on the staking sequence of the laminates and the type of loading, various matrix cracking behavior were found. Under static loading, the matrix cracks were mainly close to the specimen edges. A few carcass were found to penetrate the specimen width, even when the load was large enough to break the specimen. However, under fatigue cyclic load, the edge initiated cracks propagated fully across the specimen width. Combined with the fatigue Paris Rule and considering the ply thickness and stacking sequence, the energy release rte method was applied to predict the reations between the loading strain amplitude and fatigue cycles for matrix cracking failure.
机译：系统研究了一种新型高性能热塑性复合材料K3B / IM7的基体开裂行为。在静态和张力下测试了[0_2 / 90_2 / 0_2]，[0_2 / 90_4 / 0_2]和准各向同性层压板[＋ 45/0 / -45 / 90] _s的各种分组厚度和层堆叠顺序的层压板。张力疲劳负荷。根据层压板的铆接顺序和载荷类型，发现了各种基体开裂行为。在静态载荷下，基体裂纹主要靠近试样边缘。即使负载足够大，足以破坏样品，也发现有少量car体穿透样品宽度。但是，在疲劳循环载荷下，边缘引发的裂纹在整个试样宽度上完全传播。结合疲劳巴黎规则，考虑层厚度和堆垛顺序，采用能量释放rte方法来预测基体开裂破坏的载荷应变幅度与疲劳周期之间的关系。

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