Yarn Pull-Out as a Mechanism for Dissipating Ballistic Impact Energy in Kevlar® KM-2 Fabric

Author:

Kirkwood John E.1,Kirkwood Keith M.1,Lee Young Sil1,Egres Ronald G.1,Wagner Norman J.1,Wetzel Eric D.2

Affiliation:

1. Department of Chemical Engineering and Center for Composite Materials, University of Delaware, Newark, Delaware 19716, U.S.A.

2. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, U.S.A.

Abstract

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

Publisher

SAGE Publications

Subject

Polymers and Plastics,Chemical Engineering (miscellaneous)

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