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Stress Analyses and Structural Modifications of Fabric Composite Seams

[+] Author Affiliations
Wenzhong Tang, Michael Keefe

University of Delaware, Newark, DE

Paper No. IMECE2002-39487, pp. 71-80; 10 pages
doi:10.1115/IMECE2002-39487
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Textile Engineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Textile Engineering Division
  • ISBN: 0-7918-3651-7 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

An adhesively bonded seam is a common method of joining coated fabrics in the manufacturing of inflatables. In this paper, Nylon and Polyester seams are studied both experimentally and numerically. In the numerical analyses, the seam components are described with layered models containing fabric composite layers. The in-plane and out-of-plane elastic constants of the fabric composite layers are derived using the crimp model and a stacked model respectively. An existing finite element code, ANSYS 5.7 is used to perform two-dimensional stress analyses of the seams under tension. In the analyses, a stress concentration factor is defined to evaluate the strength of the seams in comparison with their base fabric laminates. Numerical data show that Nylon seams are almost as strong as their base laminate but there is strength degradation in Polyester seams, which agrees well with test results. Finally, two structural modifications are proposed to improve the strength of the Polyester seams. The modifications are evaluated by both simulations and tests.

Copyright © 2002 by ASME

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