Evidence of Anisotropic Wave Propagation in Laser Shock-Loaded Quartz

摘要

The response of brittle single crystals to shock loading and their spallation under short pulsed loads are subjects of great interest for many applications. In this paper, we show that the anisotropy of single crystal quartz has a major influence on stress wave propagation and spall fracture. Post-test observations of laser shock-loaded samples reveal spall damage in unexpected locations, as well as a strong effect of the direction of shock application versus crystal orientation. Three-dimensional computations involving a simple model which accounts for the elastic properties of quartz provide a good prediction of the observed results for three different crystallographic orientations. This overall agreement confirms that quartz dynamic behaviour is conditioned by anisotropic effects which should be taken into account for a realistic description of shock wave propagation in that material.