Abstract
A high irradiance short pulsed Nd: glass laser was used to generate shock waves in alminum (Al) and copper (Cu). Dynamic fracture at hypervelocity impact conditions was observed as a result of reflected shock waves as tensile waves from the back surface of the samples. Damage development from incipient spallation to complete sample perforration were obtained in planar shock wave conditions. Maximun elongation at fracture at ultra high strain rate was measured for several metals. Shock wave attenuation and dynamic strength were evaluated for Al and Cu. The experimental results of threshold for spall and spall width at this energy were compared with numerical simulations.
The laser pulses were also used to generate hemispherical shock waves in planar targets (focal spot smaller than target thickness). A linear experimental relationship was obtanied between laser energy for threshold spall conditions and the cubic target thickness. This relation is equivalent with the progatation of a strong point explosion where the internal energy per unit volume of the shocked material is constant.
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© 1992 Springer Science+Business Media New York
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Eliezer, S., Gilath, I., Gazit, Y. (1992). Laser Induced Shock Waves and Dynamic Damage. In: Miley, G.H., Hora, H. (eds) Laser Interaction and Related Plasma Phenomena. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3324-5_46
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DOI: https://doi.org/10.1007/978-1-4615-3324-5_46
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