Material failure and pattern growth in shock-driven aluminum cylinders at the Pegasus facility

Stokes, John; Fulton, R. D.; Morgan, D. V.; Obst, A. W.; Oro, D. M.; Oona, H.; Anderson, W.; Chandler, E. A.; Egan, P.
April 2000
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p493
Academic Journal
Experiments on the Pegasus pulsed power facility have investigated material failure and the growth of sinusoidal perturbations machined on the free inner surface of both A1 1100 and A1 6061-T6 samples undergoing shocked acceleration. The material behind the free surface exhibits massive microspall resulting in a volume of low-density material. Rapid pattern growth in the failed material and subsequent pattern growth on the surface, including jetting in some cases, were seen. Shock pressures were 15 GPa and 50 GPa.


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