会议专题

HIGH-SPEED PHOTOGRAMMETRIC ANALYSIS ON THE BALLISTIC BEHAVIOR OF KEVLAR( R ) FABRICS: IN SITU YARN DISPLACEMENT AND STRAIN MEASUREMENTS

Kevlar(R) fabrics are widely used in protective armor. There is a need to understand the penetration mechanics on the fabrics. Photogrammetry is an image correlation 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 3D displacement field on the fabric during a ballistic impact is obtained. Subsequently, a strain field on the fabric can be derived from the displacement vectors. More importantly, the strains on the individual yam are determined. The experimental data not only can provide valuable insight into effects of yarn properties, boundary conditions, crimps and friction on die mechanics of the fabrics, but also serve as validation tools for the modeling of fabrics. Results from the high-speed photogrammetric analysis of Kevlar fabrics that undergo ballistic impact are presented in this paper.

YU Jian H. Peter G. Dehmer YEN Chian-Fong

US Army Research Laboratory, Aberdeen Proving Ground, MD 21005, USA

国际会议

25th International Symposium on Ballistics(第25届国际弹道会议)

北京

英文

1485-1492

2010-05-17(万方平台首次上网日期,不代表论文的发表时间)