Spallation of metal targets subjected to intense laser shocks
作者:
T. de Resse´guier,
S. Couturier,
J. David,
G. Nie´rat,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 82,
issue 5
页码: 2617-2623
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.366075
出版商: AIP
数据来源: AIP
摘要:
Piezoelectric polymer gauge measurements were performed on the rear surface of plane copper and aluminum foils irradiated by infrared laser pulses of 1.5 ns duration, with intensities up to about 7 T W/cm2, using recently developed transducers made of a vinylidene-fluoride and trifluoroethylene copolymer. Some gauge records have indicated that incipient spall damage occurs in the samples subjected to very intense shocks. This was confirmed by post-test examination of the targets. The experiments were simulated using two computer codes: one describes laser–matter interaction and provides input to the second code that handles wave propagation. A spall model for ductile metals is integrated in the wave code. The ability of those computer models to predict the experimental results was thereby tested. Overall agreement was obtained between the gauge measurements and calculations, except for some discrepancies that are discussed. ©1997 American Institute of Physics.
点击下载:
PDF
(1598KB)
返 回