Numerical study of a spherical to plane wave diffuser for shock wave in solids

R. Gonzalez-Romero; M. Strojnik; G. Garcia-Torales

doi:10.1117/12.2529754

9 September 2019 Numerical study of a spherical to plane wave diffuser for shock wave in solids

R. Gonzalez-Romero, M. Strojnik, G. Garcia-Torales

Proceedings Volume 11128, Infrared Remote Sensing and Instrumentation XXVII; 1112812 (2019) https://doi.org/10.1117/12.2529754
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

A shock wave is a pressure wave in the order of giga-pascal, and duration of nanoseconds, which propagates above the speed of sound in a solid medium. The shock wave can be induced in a small area on the solid sample surface by a highpower density laser pulse. As a result, the propagation of the shock wave, inside the solid, is considerate spherical. Waveguides can be used to drive a shock wave to a different point of interest. However, semi-spherical wave propagation involves some problems inside the waveguide, such as multiple reflections, phase shifts, and pressure decays due to wall reflections, among others. In this work, is proposed a finite element simulation of a spherical shock wave propagation inside a solid. We describe a method to correct a semi-spherical wave to plane wave propagation. We assume a point source semi-spherical distribution inside the material. The shock wave dispersion to the confining media is disregarded. The flat reflector location and shock trap geometry restrict the radius of curvature of the spherical reflector. This method can be useful to analyze the impulse response of solids to an incoming plane wave.

Citation Download Citation

R. Gonzalez-Romero, M. Strojnik, and G. Garcia-Torales "Numerical study of a spherical to plane wave diffuser for shock wave in solids", Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 1112812 (9 September 2019); https://doi.org/10.1117/12.2529754

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