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TECHNICAL PAPERS

The Onset of Tearing at Slits in Stressed Coated Plain Weave Fabrics

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

Natick Soldier Center, U.S. Army Research, Development & Engineering Command, Natick, MA 01760-5020

J. N. Rossettos

Department of Mechanical, Industrial & Manufacturing Engineering, Northeastern University, Boston, MA 02115-5096

S. E. Bosselman

Natick Soldier Center, U.S. Army Research, Development & Engineering Command, Natick, MA 01760-5020

J. Appl. Mech 71(6), 879-886 (Jan 27, 2005) (8 pages) doi:10.1115/1.1794165 History: Received November 24, 2003; Revised April 02, 2004; Online January 27, 2005
Copyright © 2004 by ASME
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References

Hedgepeth, J. M., 1961, “Stress Concentrations in Filamentary Structures,” NASA Technical Note D-882, NASA Langley Research Center, Langley Field, VA.
Topping,  A. D., 1973, “The Critical Slit Length of Pressurized Coated Fabric Cylinders,” J. Coated Fabrics,3, pp. 96–110.
Ko,  W. L., 1975, “Fracture Behavior of a Nonlinear Woven Fabric Material,” J. Compos. Mater., 9, pp. 361–369.
Wardle,  M., 1978, “Aramid Fibers for High Performance Coated Fabrics,” J. Coated Fabrics,7, pp. 334–356.
Rossettos,  J. N., and Godfrey,  T. A., 1998, “Damage Analysis in Fiber Composite Sheets and Uncoated Woven Fabrics,” Appl. Mech. Rev., 51(6), pp. 373–385.
Szostkiewicz,  C., and Hamelin,  P., 2000, “Stiffness Identification and Tearing Analysis for Coated Membranes Under Biaxial Loads,” J. Coated Fabrics,30(2), pp. 128–145.
Davidson,  D. L., Nicolella,  D. P., and Spigel,  B. S., 2000, “Fracture Toughness of Fabrics as Composite Reinforcements,” Exp. Mech., 40(4), pp. 408–414.
Davidson, D. L., and Nicolella, D. P., 1999, “Fracture Micromechanics as Influenced by Environment in Textile Reinforced Ceramic Matrix Composites,” Technical Report 18-7943-001, Southwest Research Institute, San Antonio, TX.
Beyerlein,  I. J., and Phoenix,  S. L., 1996, “Stress Concentrations Around Multiple Fiber Breaks in an Elastic Matrix With Local Yielding or Debonding Using Quadratic Influence Superposition,” J. Mech. Phys. Solids, 44, pp. 1997–2039.
Godfrey, T. A., and Rossettos, J. N., 2002, “A Micromechanical Model for Slit Damage in Coated Plain Weave Fabric,” Developments in Theoretical and Applied Mechanics, Vol. XXI (Proc. of 21st SECTAM), A. J. Kassab, D. W. Nicholson, and I. Ionescu, eds., Rivercross Publishing, Orlando, pp. 315–324.
Godfrey,  T. A., and Rossettos,  J. N., 1998, “Damage Growth in Prestressed Plain Weave Fabrics,” Text. Res. J., 68(5), pp. 359–370.
Godfrey,  T. A., and Rossettos,  J. N., 1999, “The Onset of Tear Propagation at Slits in Stressed Uncoated Plain Weave Fabrics,” ASME J. Appl. Mech., 66(4), pp. 926–933.
Rossettos,  J. N., and Shishesaz,  M., 1987, “Stress Concentration in Fiber Composite Sheets Including Matrix Extension,” ASME J. Appl. Mech., 54, pp. 723–724.
Rossettos,  J. N., and Olia,  M., 1995, “On the Hybrid Effect and Matrix Yielding at Fibre Breaks in Hybrid Composite Sheets,” Mech. Comp. Mater. Struct.,2, pp. 275–280.
Phoenix, S. L., and Beyerlein, I. J., 2000, “Statistical Strength Theory for Fibrous Composite Materials,” Comprehensive Composite Materials, A. Kelly, C. Zweben, and T. W. Chou, eds., Vol. 1, Pergamon, pp. 559–639.
Godfrey,  T. A., and Rossettos,  J. N., 1999, “A Parameter for Comparing the Damage Tolerance of Stressed Plain Weave Fabrics,” Text. Res. J., 69(7), pp. 503–511.

Figures

Grahic Jump Location
Configuration of biaxial remote stresses on damaged fabric
Grahic Jump Location
(a). Geometry of damaged fabric indicating the elastic deformation. Breaks in #1 yarns, dashed lines represent deformed #2 yarns. (b). Equilibrium of the jth cross-over point unit cell under forces due to rotation of the tensioned #2 yarns and shear in the coating.
Grahic Jump Location
Cross-section showing first intact #1 yarn at slit tip and location of possible separation or yielding of coating. Arrows indicate motion of #2 yarns.
Grahic Jump Location
Analytical results for inelastic zone extent, l⁁, with increasing applied load, p⁁, for slits involving seven, fifteen, and 31 severed yarns (# breaks indicated next to curves)
Grahic Jump Location
Experimental (symbols) and analytical results (curves) for SCFt versus slit length. Top-most curve, labeled “Hedgepeth,” shows SCFt from Ref. 1. Remaining curves indicate results for various p⁁u (values indicated next to curves).
Grahic Jump Location
Post-test condition of fabric c specimen

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