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利用传播的水平剪切超声波中的高阶谐波产生评估材料完整性

Evaluation of Material Integrity Using Higher-Order Harmonic Generation in Propagating Shear Horizontal Ultrasonic Waves.

作者信息

Radecki Rafał, Staszewski Wiesław J

机构信息

AGH University of Krakow, Faculty of Mechanical Engineering and Robotics, Department of Robotics and Mechatronics, al. Mickiewicza 30, 30-059 Krakow, Poland.

出版信息

Materials (Basel). 2024 Aug 9;17(16):3960. doi: 10.3390/ma17163960.

DOI:10.3390/ma17163960
PMID:39203136
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11355468/
Abstract

Material nonlinearity is explored for the assessment of structural integrity. Crack-wave interactions are of particular interest. The major focus is on higher-order harmonics, generated in propagating shear horizontal (SH) waves. These harmonics are generated due to global material nonlinearity and local effects such as fatigue cracks. The theoretical background of the proposed method is explained. The method is examined using numerical simulations and experimental tests. The former involves the Local Interaction Simulation Approach (LISA), implemented for the nonlinear shear horizontal wavefield. The latter is based on a high-frequency shear excitation approach. Experimental tests are conducted using a series of beam specimens with fatigue cracks. Low-profile, surface-bonded piezoceramic shear actuators are used for excitation. The excitation frequency is selected to minimize the number of generated modes in the examined specimens. Nonlinear ultrasonic responses are collected using a non-contact laser vibrometer. The results show that higher-order harmonic generation-based on shear horizontal wave propagation-can be used for crack detection in the presence of global material nonlinearity.

摘要

为评估结构完整性，对材料非线性进行了研究。裂纹与波的相互作用尤其令人关注。主要聚焦于在传播的水平剪切（SH）波中产生的高阶谐波。这些谐波是由整体材料非线性和诸如疲劳裂纹等局部效应产生的。解释了所提方法的理论背景。使用数值模拟和实验测试对该方法进行了检验。前者涉及为非线性水平剪切波场实施的局部相互作用模拟方法（LISA）。后者基于高频剪切激励方法。使用一系列带有疲劳裂纹的梁试件进行实验测试。采用低剖面、表面粘贴的压电陶瓷剪切致动器进行激励。选择激励频率以尽量减少被检测试件中产生的模态数量。使用非接触激光测振仪采集非线性超声响应。结果表明，基于水平剪切波传播的高阶谐波生成可用于在存在整体材料非线性的情况下进行裂纹检测。

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Modelling nonlinearity of guided ultrasonic waves in fatigued materials using a nonlinear local interaction simulation approach and a spring model.使用非线性局部相互作用模拟方法和弹簧模型对疲劳材料中的导波非线性进行建模。
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应用于骨损伤评估的非线性共振超声光谱法（NRUS）。
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