2020 Volume 59 Issue 2 Pages 195-200
Optical visualization is used to visualize ultrasonic Lamb waves in a glass plate, but it can only be captured in two dimensions because light is transmitted straight through the medium. Therefore, one dimension may be integrated and visualized. A three-dimensional simulation was performed using the finite element method to clarify the existence of the integrated optical effect of optical visualization. A Lamb wave, a type of guided wave, was propagated through the medium. The simulation results show that the stress distribution differs depending on the cross section and the mode of the generated Lamb wave also differs. Furthermore, as a result of adding the stress distributions of all sections, the stress distribution and the modal distribution completely matched the sensitive tint method, and it was clarified that the optically visualized image had an optical integral effect.
