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首页> 外文期刊>Journal of Composite Materials >Evolution of the impact strength of carbon fiber-reinforced PEI following exposure to mechanical, hygrothermal and hygrothermomechanical aging
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Evolution of the impact strength of carbon fiber-reinforced PEI following exposure to mechanical, hygrothermal and hygrothermomechanical aging

机译：暴露于机械，湿热和湿热机械老化后碳纤维增强PEI冲击强度的演变

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摘要

The instrumented impact test in a falling weight tower was used to obtain the influence of hygrothermal exposure (temperature and humidity), mechanical exposure (flexure load) and the addition of both types of aging (hygrothermomechanical) on the impact properties of a composite with a thermoplastic matrix reinforced with carbon fiber fabric. During the tests, the Charpy specimens employed were positioned so that the hammer struck the piled up plies of the composites transversely. This condition contributed to delamination along the planes of the interface. The energy obtained has two components: initiation and propagation. These components must be calculated independently and could be used to evaluate the behavior of the material subjected to these types of exposure. An analysis was carried out of the specific advantages of this test method in composite materials. From the results, it can be deduced that the fracture toughness of the material does not suffer substantial variations if the exposures are independent. However, their combined action does modify the behavior of the material; in which case, a significant decrease in toughness can be observed.
机译：在落锤塔中进行的仪器化冲击试验用于获得湿热暴露（温度和湿度），机械暴露（挠性载荷）以及两种类型的时效处理（湿热力学）对复合材料复合材料冲击性能的影响。碳纤维织物增强的热塑性基体。在测试过程中，将所用的夏比（Charpy）样品放置在适当的位置，以使锤子横向撞击复合材料的堆积层。这种情况导致沿界面平面分层。获得的能量有两个组成部分：引发和传播。这些成分必须独立计算，并且可用于评估经受这些类型的暴露的材料的性能。分析了该测试方法在复合材料中的特定优势。从结果可以推论，如果暴露是独立的，则材料的断裂韧性不会遭受很大的变化。但是，它们的综合作用确实会改变材料的行为。在这种情况下，可以观察到韧性显着降低。

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