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Assessment of a damage model for wound composite structures by acoustic emission

机译：通过声发射评估伤口复合结构的损伤模型

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摘要

This paper deals with the link between the acoustic activity due to damage in wound composite structures and the simulated evolution of damage variables. A damage model able to accurately capture the different degradation modes which may occur in this type of material is first selected. A parallel is drawn between the continuous evolution of the damage variables and the discrete acoustic events. The mechanical behaviour of notched samples made of two different wound composite lay-ups and involving complex damage combinations are simulated and compared to acoustic emission. The satisfactory correlation confirms the physical meaning of the damage variables and validates the model assumptions. The association of experimental acoustic signals and a damage model is a tool to understand the degradation scenario of wound composite structures and the meaning of the recorded acoustic events.
机译：本文探讨了由于伤口复合结构中的损伤引起的声活动与损伤变量的模拟演变之间的联系。首先选择能够准确捕获在这种类型的材料中可能发生的不同降解模式的损伤模型。在损伤变量的连续演变和离散的声音事件之间绘制了一个相似之处。模拟了由两个不同的伤口复合铺层制成并涉及复杂损伤组合的缺口样品的力学行为，并将其与声发射进行了比较。令人满意的相关性证实了损伤变量的物理含义并验证了模型假设。实验声信号和损伤模型的关联是了解伤口复合结构的降解情况和记录的声事件含义的工具。

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