A numerical study of the interaction of laser-generated circumferential wave with defect on hollow cylinder

作者：Zhao, Yan^*; Shen, Zhonghua; Lu, Jian; Ni, Xiaowu; Cui, Yiping

来源：Optics and Laser Technology, 2012, 44(2): 407-411.

DOI：10.1016/j.optlastec.2011.08.004

• Circumferential waves
• Defect
• Laser ultrasonic

A finite element method is used to investigate the laser-induced circumferential waves on a hollow cylinder with a surface defect. After a control numerical experiment for correctness verification, the method is used to simulate the circumferential waves on hollow cylinder having a defect with different source-defect angles, depths, and widths. The results show that the existence of the defect will generate a bipolar waveform between the S(0) mode and the A(0) mode in the circumferential waves, and its emerging time and amplitude linearly depend on the source-defect angle and the depth of defect, respectively. Moreover, we also find that the width of defect has obvious influence on the circumferential waves.

• 出版日期2012-3
• 单位南京理工大学; 东南大学