Damage and failure mechanism of bullets impact sapphire based on LS-DYNA

DOI

10.2991/icmea-17.2018.41How to use a DOI?

Keywords

component; sapphire; bullet impact; penetration; LS-DYNA

Abstract

Based on the Johnson-Holmquist-Ceramics material model in LS-DYNA, the penetration process of the bullet impact sapphire plate is simulated by finite element method, and the penetration failure mechanism is also analyzed. Four main observations are obtained-First, when the bullet hits the sapphire plate, the warhead does not invade the panel immediately, but is firstly roughened and abraded. Secondly, the force on the warhead increased sharply and reached the peak value in the process of the formation of the sapphire smash cone. Thirdly, after the smash cone is completely formed, the plate strength decreases gradually and the force of the projectile appears fluctuating or decreasing. Finally, in the whole penetration process, the fragmentation and cracking of sapphire mainly serve to absorb most of the kinetic energy of the bullets and to reduce the bullet speed. This study provides a reference for the design of bulletproof composite armor.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Siyu Liu
AU  - Zhipeng Qu
AU  - Mingyun Lv
AU  - Guangyuan Ma
PY  - 2018/02
DA  - 2018/02
TI  - Damage and failure mechanism of bullets impact sapphire based on LS-DYNA
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 178
EP  - 182
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.41
DO  - 10.2991/icmea-17.2018.41
ID  - Liu2018/02
ER  -