Simulation and imaging of air-coupled Lamb wave scanning for defects detection of composite plates

被引：0
|
作者：
Zhang H. [1 ]
Liu Y. [1 ]
Yu L. [1 ]
Zeng Z. [1 ]
机构：
[1] State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2019年 / 40卷 / 01期
关键词：
Air-coupled Lamb wave; Composite material; Defect imaging; Finite element; Nondestructive testing;
D O I：
10.19650/j.cnki.cjsi.J1804254
中图分类号：
学科分类号：
摘要：
Aiming at the shortcomings of the current air-coupled Lamb wave defect detection, the finite element simulation and experimental verification methods are used to study the air-coupled Lamb wave scanning imaging of various types of composite plate defects. Firstly, the three-dimensional propagation model of Lamb wave in composite plate is established by using ABAQUS. Based on the model, the attenuation characteristics of the air-coupled Lamb wave in scanning detection under different types of composite plate defect are studied. The simulation results show that the Lamb wave scanning signal can be used to identify the position and size of the defect in the scanning direction. Then, based on the simulation results, an air-coupled Lamb wave scanning experiment scheme is developed, and a scanning experiment system is set up. The composite plate is scanned and detected from two mutually orthogonal directions. The correctness of the finite element model is verified by comparing the simulation and experimental results. Finally, the defect images in the scanning area are obtained according to the probability damage algorithm. The imaging results indicate that the air-coupled Lamb wave defect imaging method using scanning detection can effectively identify the size, shape and damage degree of composite plate defects. © 2019, Science Press. All right reserved.
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页码：150 / 157
页数：7
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