J. Phys. IV France
Volume 110, September 2003
Page(s) 723 - 727

J. Phys. IV France
110 (2003) 723
DOI: 10.1051/jp4:20020779

How the liner material metallurgical texture affects the shaped charge jet break-up time

E. Kirsch1, 2, J. Plesek2 and D. Gabriel2

1  IDF, P.O. Box 01055, Israel
2  Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Prague 8, Czech Republic

Since the hollow charge phenomenon was discovered in the 19 $^{\rm th}$ century many discoveries have been made that have tumed the shaped charge jet formation and penetration mechanics into a status close to engineering. Still important questions remain to be answered. It was found by trial and error for example that by cold pressing copper to form the liner an increase in the jet break-up time was obtained. It is shown now that this production process prepares the internal metallurgical structure of the liner material for easy formation of shear bands. As a result the frequency of their formation increases, the jet breaks into larger number of fragments and the Vpl parameter value reduces. The evidence bringing to this conclusion is discussed in detail and recommendations for future studies are outlined.

© EDP Sciences 2003