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首页> 外文期刊>Composite Structures >Variation in the group velocity of Lamb waves as a tool for the detection of delamination in GLARE aluminium plate-like structures
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Variation in the group velocity of Lamb waves as a tool for the detection of delamination in GLARE aluminium plate-like structures

机译：兰姆波群速度的变化作为检测GLARE铝板状结构中分层的工具

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With the development of new technology and use of lightweight material such as composite laminates, new methods must be developed for in situ structural health monitoring of these materials. This paper introduces an approach for the detection of delamination present in GLARE aluminium specimens. The approach is based on the change in group velocity of Lamb waves with frequency-thickness product as the determinant parameter for the detection of delamination. Two methods are applied: a surface contact method, which utilises a wedge probe tuned to excite a single Lamb mode, and the embedded PZT method, which involves incorporating lead zirconate titanate (PZT) elements in the glass fibre reinforced resin matrix during the manufacture of the GLARE aluminium specimens. It was found that both methods enabled the detection of delaminations in the GLARE aluminium specimens, within certain limits, which are stated.
机译：随着新技术的发展和轻质材料（例如复合材料层压板）的使用，必须开发新方法来对这些材料进行原位结构健康监测。本文介绍了一种检测GLARE铝样品中脱层的方法。该方法基于兰姆波群速度的变化，其中频率厚度乘积是检测分层的决定性参数。应用了两种方法：表面接触法，利用楔形探针调谐以激发单个Lamb模式；嵌入式PZT法，包括在制造玻璃纤维增​​强树脂基体时将锆钛酸铅（PZT）元素掺入玻璃纤维增​​强树脂基体中。 GLARE铝制标本。结果发现，两种方法都能够在规定的一定限度内检测到GLARE铝样品中的分层。

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