Tomczyk, K., Landheer, D., Williams, T., Bailey, S., Skelton, V., Warnett, Jason M., Attridge, Alex and Williams, M. A. (Mark A.) (2014) The effect of bullet yaw on the threat level : a numerical investigation. In: Personal Armour Systems Symposium PASS2014, Cambridge, UK, 8-12 Sep 2014. Published in: Proceedings of the Personal Armour Systems Symposium pp. 1-10.

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Abstract

It is well known that yaw can affect the penetrative power of armour piercing rounds. To
investigate this effect purely experimentally is difficult because the typical ballistic set up does not
allow control over the yaw angle of the projectile. In this study, a numerical model is used
complementing ballistic experiments for a range of yaw angles. For the projectile, a validated
computer model of the 30-06 7.62 x 63mm AP M2 round was selected. Surrogate targets were used for
a qualitative assessment of the phenomenon. The utilized target is a flat rectangular tile. To encourage
yaw in the experimental tests, targets were positioned at relatively close distance to the breach and
impact velocity was chosen lower than typical for the projectile. Both ensure that the bullet does not
reach stable flight therefore yaw is present. From the experiments, a range of impact velocities and
yaw angles was chosen and each of the test conditions simulated. The decrease in bullet velocity ΔV
was calculated from high speed video footage captured during tests and compared to bullet ΔV in
simulation. Strain condition, predicted damage and negative pressure output from simulation were
investigated in pursue of yaw effects on threat level. The results of this study can help in the
interpretation of physical test results and ultimately can contribute to making the performance of
armour systems more robust.

Item Type:	Conference Item (Paper)
Alternative Title:
Subjects:	U Military Science > U Military Science (General)
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Ballistics, Body armor
Journal or Publication Title:	Proceedings of the Personal Armour Systems Symposium
Official Date:	2014
Dates:	Date Event 2014 UNSPECIFIED
Page Range:	pp. 1-10
Status:	Peer Reviewed
Publication Status:	Published
Conference Paper Type:	Paper
Title of Event:	Personal Armour Systems Symposium PASS2014
Type of Event:	Conference
Location of Event:	Cambridge, UK
Date(s) of Event:	8-12 Sep 2014

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