Abstract

The paper presents the results on application of Lamb waves based technique for impact damage detection and severity identification. The PZT network operates in the round-robin mode changing the actuator and sensor roles of the transducers in order to detect the response of the system in the presence of damage. The monitoring is performed via the analysis of three parameters: change of the amplitude (dA), change of the energy (dP) and cross-correlation (NCC) of the signals in baseline and damaged state. Testing of laminate CFRPs shows that the damage location is estimated with an error of 5–15 mm, while the computed Damage index is linearly dependent on the applied impact energy. For honeycomb CFRPs the NCC parameter do not provide accurate results, however, other parameters allow identification within the 5–20 mm error and reflect accurate data on the severity of the damage.

中文翻译：

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使用兰姆波超声波传感检测层压板和蜂窝状 CFRP 的冲击损伤

摘要

本文介绍了基于兰姆波的技术在冲击损伤检测和严重程度识别中的应用结果。PZT 网络以循环模式运行，改变换能器的执行器和传感器角色，以便检测系统在出现损坏时的响应。监测是通过分析三个参数来执行的：基线和损坏状态下信号的幅度变化 (dA)、能量变化 (dP) 和互相关 (NCC)。层压 CFRP 的测试表明，估计损坏位置的误差为 5-15 毫米，而计算出的损坏指数与施加的冲击能量呈线性关系。然而，对于蜂窝状 CFRP，NCC 参数不能提供准确的结果，