Yarn Pull-Out as a Mechanism for Dissipation of Ballistic Impact Energy in Kevlar KM-2 Fabric, Part 1: Quasi-Static Characterization of Yarn Pull-Out

Abstract

Yarn pull-out can be an important energy absorption mechanism during the ballistic impact of woven Kevlar fabric. This study reports the effects of fabric length, number of yarns pulled, arrangement of yarns, and transverse tension on the force-displacement curves for yarn pull-out tests on Kevlar KM-2 fabric under laboratory conditions. A semi-empirical model is presented for predicting the yarn pull-out force and energy as a function of pull-out distance, including both yarn uncrimping and subsequent yarn translation. This model is found to replicate the experimental data to a high degree of accuracy, and should prove useful for understanding ballistic experiments and improving computational modeling of fabrics.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2004
Accession Number
ADA425479

Entities

People

  • Eric D. Wetzel
  • John E. Kirkwood
  • Keith M. Kirkwood
  • Ronald G. Egres Jr.
  • Young S Lee

Organizations

  • University of Delaware

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Biocomposites
  • Chemical Engineering
  • Composite Materials
  • Data Sets
  • Displacement
  • Dissipation
  • Engineering
  • Experimental Data
  • Failure Mode And Effect Analysis
  • Laminates
  • Materials
  • Materials Science
  • Military Research
  • Textiles
  • Translations
  • Transverse

Readers

  • Computational Modeling and Simulation
  • Materials Science
  • Mechanical Engineering/Mechanics of Materials.