NCJ Number
234316
Date Published
January 2008
Length
4 pages
Annotation
This report reviews the material testing of body armor.
Abstract
An apparatus was designed and built that attaches to servo-hydraulic machines that typically perform material fatigue testing. The device was designed to systematically fold woven fabric and yarns of ballistic fibers to assess the impact of mechanical folding, such as may occur during use, on ballistic fiber properties. Initial tests indicate that the device repeatedly folds a piece of woven fabric at the same location. However, when the device is in the open position, a consistent 1 cm movement of the fabric was observed. A slight modification of the apparatus is required to eliminate this movement. After cycling a piece of woven poly(benzoxazole) (PBO) fabric for 5,500 cycles, an 18 percent reduction in the ultimate tensile strength and strain to failure of the PBO fibers was observed. Research is continuing to determine a relevant and optimized testing protocol. (Published Abstract)
Date Published: January 1, 2008
Downloads
Similar Publications
- From the Director: Harnessing the Power of Data-Driven, Inclusive Research
- Assessing The Evidence: How Systems That Address Intimate Partner Violence Evaluate The Credibility And Utility Of Research Findings
- Evaluation of a Situational Crime Prevention Approach in Three Jails: The Jail Sexual Assault Prevention Project