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首页> 外文期刊>Journal of Composite Materials >Lamb wave evaluation of the effects of thermal-mechanical aging on composite stiffness
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Lamb wave evaluation of the effects of thermal-mechanical aging on composite stiffness

机译:兰姆波评估热机械老化对复合材料刚度的影响

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摘要

Lamb wave methods offer a promising approach for evaluating damage in composite materials. The Lamb wave velocity is directly related to the material parameters, so an effective tool exists to monitor damage in composites by measuring the velocity of these waves. In this work, studies have been conducted which examine the effects of combined thermal and mechanical aging in thermoplastic composite samples using symmetric mode Lamb wave velocity measurements. From the velocity measurements, the in-plane stiffnesses, A{sub}11 and A sub}22, are calculated. The samples examined include a baseline specimen with 0 hours, specimens which have been aged 3,500 and 5,000 hours, and one specimen with 1000 hours of accelerated aging. The results of the Lamb wave measurements are compared to C-scans of the panels.
机译:兰姆波方法为评估复合材料的损伤提供了一种有前途的方法。兰姆波速度与材料参数直接相关,因此存在一种有效的工具,可通过测量这些波的速度来监测复合材料中的损伤。在这项工作中,已经进行了一些研究,这些研究使用对称模式Lamb波速度测量来检查热塑性复合材料样品中热和机械老化的综合影响。根据速度测量值,计算面内刚度A {sub} 11和A sub} 22。检查的样品包括一个基准样品,其时效为0小时,已经老化3500和5,000小时的样品,以及一个老化时间为1000小时的样品。将兰姆波测量结果与面板的C扫描进行比较。

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