High-speed Photogrammetric Analysis on the Ballistic Behavior of Kevlar Fabrics Impacted by Various Projectiles

Report No. ARL-TR-5333
Authors: Jian H. Yu, Peter G. Dehmer, and Chian-Fong Yen
Date/Pages: September 2010; 32 pages
Abstract: There is a need to understand the penetration mechanics on Kevlar fabrics, as they are widely used in protective armors. Photogrammetry is an imaging technique that determines geometric properties, such as the displacement history, by tracking the minute changes in the pixel pattern on the digital image of interest. By combining high-speed photography with photogrammetric technique, a full-field view on the 3-D displacement by the fabric during ballistic impact is made possible. The displacement data is essential for evaluating the ballistic performance of the fabrics. More importantly, the experimental data not only provides valuable insight into effects of yarn properties, boundary conditions, crimps, and frictions on the mechanics of the fabrics, but also serves as a validation tool for the modeling of fabrics. Results from high-speed photogrammetric analysis of Kevlar fabrics that undergo ballistic impact are presented in this report.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2010