Accession Number : ADA424323


Title :   Yarn Pull-Out as a Mechanism for Dissipation of Ballistic Impact Energy in Kevlar KM-2 Fabric, Part 2: Prediction of Ballistic Performance


Descriptive Note : Final rept. Jan 2003-Dec 2003


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE


Personal Author(s) : Kirkwood, John E ; Kirkwood, Keith M ; Lee, Young S ; Egres, Ronald G , Jr ; Wetzel, Eric D


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a424323.pdf


Report Date : May 2004


Pagination or Media Count : 34


Abstract : The energy absorbed in ballistic fabrics is modeled by assuming yarn pull-out including yarn uncrimping and translation as the primary energy absorption mechanisms. Using a semi-empirical model of yarn pull-out based on laboratory tests predictions for ballistic performance of fabrics are compared to ballistic test results. It is demonstrated that quasi-static pull-out results can be correlated quantitatively with yarn pull-out during ballistic impact.


Descriptors :   *POLYAMIDE PLASTICS , TEST AND EVALUATION , IMPACT , PREDICTIONS , FABRICS , BALLISTICS , YARNS , ENERGY ABSORBERS


Subject Categories : Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE