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TECHNICAL PAPERS

The Onset of Tear Propagation at Slits in Stressed Uncoated Plain Weave Fabrics

[+] Author and Article Information
T. A. Godfrey

U.S. Army Soldier and Biological Chemical Command, Natick Soldier Center, Mail Stop AMSSB-RSS-M, Natick, MA 01760-5020

J. N. Rossettos

Department of Mechanical, Industrial and Manufacturing Engineering, Northeastern University, Boston, MA 02115

J. Appl. Mech 66(4), 926-933 (Dec 01, 1999) (8 pages) doi:10.1115/1.2791799 History: Received December 02, 1998; Revised May 11, 1999; Online October 25, 2007

Abstract

A simple micromechanical model is developed to predict the onset of tear propagation at slit-like damage sites (i.e., a series of consecutive aligned yarn breaks) in biaxially stressed plain weave fabrics under increasing loading. A crucial aspect of the model is the treatment of the frictional slip of yarns near the damage site. Although the actual configuration of slipping regions is complex, the onset of tear propagation in large slits (i.e., more than, say, 35 breaks) is dominated by slip occurring on the first few intact yarns adjacent to the breaks. The assumptions in the mathematical model were motivated by both experimental observations and calculations for key configurations. Analytical results obtained for this simple model exhibit good agreement with experimental results, which are presented for a variety of fabrics with initial slits of 35 and 45 breaks.

Copyright © 1999 by The American Society of Mechanical Engineers
Topics: Textiles , Yarns
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