The Pit-forming Mechanism of Tungsten Alloy Fragments Penetrating High-strength Steel under Ultra-high Speed impact

Abstract

Based on the background of new high-strength steel protective materials hitted by the ultrahigh speed weapons, the Hugoniot elastic limit strength of the material was obtained through the high-strength steel flying fragment impact test. A two-stage light gas gun was used to carry out an ultra-high speed impact test on the 6 g tungsten alloy spherical fragments penetrating the high-strength steel target, and the ANSYS/LS-DYNA software was used to perform numerical calculations of the ultra-high speed penetration. The experimental results reveal that the Hugoniot elastic limit strength obtained in the test can provide a good reference for the correction of simulation parameters. There are differences in the pit formation mechanism of high-strength steel at different speeds. At ultra-high speeds, the penetration depth is reduced due to the shearing, spalling, delamination and material properties of the projectile.

Keywords

crater formation mechanism / experimental study / hugoniot elastic limit / ultra-high speed collision / numerical simulation

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Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature