Experimental Characterization of Anisotropic Mechanical Properties of Textile Woven Fabric

Authors: Rym Zouari, Sami Ben Amar, Abdelwaheb Dogui

Abstract:

This paper presents an experimental characterization of the anisotropic mechanical behavior of 4 textile woven fabrics with different weaves (Twill 3, Plain, Twill4 and Satin 4) by off-axis tensile testing. These tests are applied according seven directions oriented by 15° increment with respect to the warp direction. Fixed and articulated jaws are used. Analysis of experimental results is done through global (Effort/Elongation curves) and local scales. Global anisotropy was studied from the Effort/Elongation curves: shape, breaking load (Frup), tensile elongation (EMT), tensile energy (WT) and linearity index (LT). Local anisotropy was studied from the measurement of strain tensor components in the central area of the specimen as a function of testing orientation and effort: longitudinal strain ɛ_L, transverse strain ɛ_T and shearing ɛ_LT. The effect of used jaws is also analyzed.

Keywords: Anisotropy, Off-axis tensile test, strain fields, Textile woven fabric.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1123767

References:

[1] M.P. Nemeth, C.T. Herakovich, D. Post, “On the off-axis tensile test for unidirectional composites. Interim rept. no. 28, Apr. 1982.
[2] R. Zouari, “Analyse du comportement mécanique d'un tissu en traction off-axis,” Editions universitaires européennes, 2014.
[3] N.J. Pagano, J.C. Halpin, “Influence of End Constraint in the Testing of Anisotropic Bodies,” Composites materials, 1968, V2, N4, page 18-31.
[4] M.P. Nemeth, C.T. Herakovich, D. Post, “On the off-axis tensile test for unidirectional composites”. 1982. Virginia Polytechnic Institute and State University Engineering Science and Mechanics Blacksburg, National Aeronautics and Space Administration Hampton. privet publication.
[5] F. Pierron, E. Alloba, Y. Surrel, A. Vauran, “whole-field assessment of the effect of boundary conditions on the strain field in off-axis tensile testing of unidirectional composite,” Compos Sci Technol, 1998, V 58, pp 1939-1947,
[6] G. Ping, K. Greenwood, “The Scope for Fabric Engineering by Means of the Weave,” J. Text I, 1986 V 77, N2, pp 88-103,
[7] P. Ning, M.Y. Yoon, “Structural anisotropy, Failure criterion and shear strength of woven fabrics,” Text Res J, 1996, V66, N4, pp 238-244.
[8] S.P. Ng, R. Ng, W. Yu, “Bilinear approximation of anisotropic Stress-Strain properties of woven fabrics.” RJTA, 2005, V9, pp1–15.
[9] R. Zouari, S. Ben Amar, A. Dogui, “Experimental and numerical analyses of fabric off-axes tensile test,” J Text I, Jan 2010, V. 101, N 1, pp 58–68.
[10] C.Y. Ho, “A new end tab design for off-axis tensile test of composites materials,” HTMIAC Report 5, 1987.
[11] A. Dogui, “Two-Dimensional large-strain kinematics: application to tensional and off-axis tensile tests,” J M T A, 1988, V. 7, N 1, pp 43–64.