Finite element analysis of a thickness meter based on laser shock waves

Ricardo Gonzalez-Romero; Roberto C. Barragan; Gilberto Gomes-Rosas; Guillermo Garcia-Torales; Marija Strojnik

doi:10.1117/12.2677947

20 October 2023 Finite element analysis of a thickness meter based on laser shock waves

Ricardo Gonzalez-Romero, Roberto C. Barragan, Gilberto Gomes-Rosas, Guillermo Garcia-Torales, Marija Strojnik

Proceedings Volume 12686, Infrared Remote Sensing and Instrumentation XXXI; 126860P (2023) https://doi.org/10.1117/12.2677947
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

A laser shock wave is a pressure wave that travels through a material at supersonic speed induced by a high-power laser pulse. Shock waves suddenly change direction as reflected at the physical limits of the medium, producing interference between the wave remnants. The reflected wave reaches the front surface transiting a distance as a function of the thickness and the reflection angle. The time it takes for the shock wave from being induced to reflect toward the front surface of the material can be used to determine the thickness of the propagation medium. A finite element method estimate the propagation of a laser shock wave in four basic geometric shapes of 6061-T6 aluminum alloy. The time it takes to reach the front surface of the geometric shapes is measured. Its controlled the material thickness and spatial coordinate of the induction. The effects of the porosity, absorption and transmission of the medium are ignored. The results demonstrate the feasibility of use the time-of flight as a thickness measurement and a distribution of compression and pressure zones inside the medium generated by the wave interference. Some applications of this method are to determine the thickness of solid materials, the estimation of caverns or aquifers on geophysics, and the determination of the density of a material.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ricardo Gonzalez-Romero, Roberto C. Barragan, Gilberto Gomes-Rosas, Guillermo Garcia-Torales, and Marija Strojnik "Finite element analysis of a thickness meter based on laser shock waves", Proc. SPIE 12686, Infrared Remote Sensing and Instrumentation XXXI, 126860P (20 October 2023); https://doi.org/10.1117/12.2677947

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