Abstract
Spall at ultra high strain rate (107 sec−1) was investigated in a variety of materials using short pulsed laser induced shock waves. The intensities of our 3.5 nsec Nd: Glass laser were in the range 1010–1012 W/cm2, and the foil thicknesses in the 0.01–0.1 cm range. The laser generated shock wave pressure was in the domain of a few hundred kilobars. The controlled stepwise increase in laser energies allowed us to find the stages of damage evolution from incipient to complete perforation of the target foils.
A new experimental method was developed in order to calculate the decay of the laser generated shock waves. This technique enabled us to evaluate the laser induced spall pressure in different materials. In particular, experiments were performed on alumminum, copper and unidirectional carbon fiber epoxy composites. For the composites, the tensor character of the spall strength was demonstrated.
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© 1991 Springer Science+Business Media New York
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Eliezer, S., Gazit, Y., Gilath, I. (1991). Shock Wave Decay and Spallation in Laser-Matter Interaction. In: Hora, H., Miley, G.H. (eds) Laser Interaction and Related Plasma Phenomena. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3804-2_36
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DOI: https://doi.org/10.1007/978-1-4615-3804-2_36
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