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

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 S0 mode and the A0 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.

► We model the full field of laser-induced circumferential wave in hollow cylinder.
► Model take the temperature dependence of thermal parameters into account.
► Relationship between circumferential wave and defect.