Weld Root Crack Detection in Metal Plates Using Nonlinear Higher-Order Lamb Waves in Lame<acute accent> Mode

被引:0
作者
Fukuda, Makoto [1 ]
Nishihira, Morimasa [1 ]
机构
[1] Akita Univ, 1-1 Tegata Gakuen Machi, Akita 0108502, Japan
关键词
second harmonic ultrasonic wave; Lamb waves; Lame<acute accent> mode; weld root crack;
D O I
10.1541/ieejjia.L24000216
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper proposes a method for weld root crack detection in metal plates using nonlinear ultrasonic methods. Second harmonic components of Lamb waves are generated during propagation, which makes it difficult to distinguish them from second harmonic components generated by the nonlinear vibrations of cracks. Therefore, the Lame<acute accent> mode is employed to suppress unnecessary second harmonic components. Additionally, higher-order modes, which are more likely to be generated than the fundamental modes, are selected. In the case of higher-order Lame<acute accent> mode Lamb waves, the second harmonic amplitude in the defect area is suppressed by approximately 10 dB compared with conventional S0 and A0 mode Lamb waves.
引用
收藏
页码:741 / 742
页数:2
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