Abstract This paper aims to develop a technique for estimating an aluminium/epoxy/aluminium lap shear joint stiffness. Shear horizontal guided waves are employed using periodic permanent magnet electromagnetic acoustic transducers (PPM EMATs). Based on the source influence of the EMATs and sensitivity of SH-like mode to adhesion, an appropriate transduction regime is selected. Different modality of inspection, such as reflection and transmission mode, is explored. The arrival time of the received signal in transmission mode depends on the adhesion level. A procedure for calculating the energy velocity in the bond and inverse calculation of bond stiffness is proposed. Experiments were performed on samples of different surface treatments. Based on the proposed method, the stiffness of the samples was estimated. Results show the technique's potential to quantify the adhesion level rather than merely classifying as good, weak, and bad bonds.

中文翻译：

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使用 PPM-EMAT 生成的剪切水平导波进行键刚度估计

摘要 本文旨在开发一种估算铝/环氧树脂/铝搭接剪切接头刚度的技术。使用周期性永磁电磁声换能器 (PPM EMAT) 来使用剪切水平导波。基于 EMAT 的源影响和 SH 样模式对粘附的敏感性，选择合适的转导方案。探索了不同的检查方式，例如反射和透射模式。传输模式下接收信号的到达时间取决于粘附水平。提出了一种计算粘合中能量速度和反向计算粘合刚度的程序。对不同表面处理的样品进行了实验。基于所提出的方法，估计了样品的刚度。结果显示该技术'