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首页> 外文期刊>Journal of Materials Engineering and Performance >Interaction of Guided Waves with Delamination in a Bilayered Aluminum-Composite Pressure Vessel
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Interaction of Guided Waves with Delamination in a Bilayered Aluminum-Composite Pressure Vessel

机译：双层铝复合压力分层引导波的相互作用

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摘要

Composite structures are likely affected by barely visible or not visible damages including delaminations, disbondings or detachments among several parts connected together to obtain the whole structure. Pressure vessels adopted for space application represent a significant case. They are designed with a metal to composite hybrid configuration. The harsh and unpredictable missions may threaten the connection between different materials inducing hidden damage. Guided ultrasonic waves are investigated in this work in view of detection and assessment of small emerging flaws at the interface level. Experimental and numerical approaches are used to predict the propagation behavior of the first antisymmetric (A(0)) Lamb wave mode. That is complicated by the interaction with the connected area, the multimodal behavior and the interaction with damage when present. However, the work demonstrates that simplified models can be used to investigate the wave field accurately with a fewer computational effort possible. Finally, theoretical considerations and numerical outcomes are used in combination to reveal the interaction phenomena and demonstrate the detection capability of A(0) mode for a possible damage index approach.
机译：复合结构可能受到几乎可见的或不可见的损害，包括在一起的几个部分之间的分层，分支或脱离，以获得整个结构。用于空间应用所采用的压力容器代表了一个重要的案例。它们设计有金属复合混合配置。苛刻和不可预测的任务可能会威胁到不同材料之间的联系诱导隐患隐藏的损害。考虑到界面水平的小型新兴缺陷的检测和评估，在这项工作中研究了引导超声波。实验性和数值方法用于预测第一反对称（A（0））羔羊波模式的传播行为。与连接区域的相互作用，多式联运行为和当前损坏的相互作用是复杂的。然而，该工作表明，简化的模型可用于准确地研究波场，以较少的计算工作。最后，理论考虑和数值结果组合使用以揭示相互作用现象，并证明可能损坏指数方法的（0）模式的检测能力。

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