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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 66
COMPUTATIONAL MECHANICS: TECHNIQUES AND DEVELOPMENTS
Edited by: B.H.V. Topping
Paper IX.3

A Finite Element Study of Stress Distribution in Textiles with Bagging

X. Zhang+, Y. Li+, K.W. Yeung+, M. Yao# and L.X. Kong*

+Institute of Textiles and Clothing, Hong Kong Polytechnic University, Kowloon, Hong Kong
#North-West Institute of Textile Science and Technology, Xi'an, China
*School of Engineering and Technology, Deakin University, Geelong, Victoria, Australia

Full Bibliographic Reference for this paper
X. Zhang, Y. Li, K.W. Yeung, M. Yao, L.X. Kong, "A Finite Element Study of Stress Distribution in Textiles with Bagging", in B.H.V. Topping, (Editor), "Computational Mechanics: Techniques and Developments", Civil-Comp Press, Edinburgh, UK, pp 235-242, 2000. doi:10.4203/ccp.66.9.3
Abstract
In this paper, the effects of fabric anisotropy and friction between fabric and a rigid ball on fabric bagging are investigated by using finite element method to simulate a bagging test developed previously. The fabric is considered as an elastic thin plate under a plane stress condition. Based on the assumption of linear relation between stress and strain, deformation energy, effective stress and pressure of fabric during bagging are analyzed with different boundary conditions, including the considerations of fabric isotropy and orthotropic anisotropy, the friction between fabric sample and the ball deforming the fabric. The results show that the fabric anisotropy and the friction affect non-uniform distribution of deformation energy during fabric bagging process. The friction between the fabric and the ball changes the position of maximum energy in the fabric. By analyzing the stress components at nodes with maximum energy, it is found that shear stress is an important component influencing energy distribution due to fabric unbalanced tensile stress in both warp and weft directions. The unbalanced stresses influence the sliding interface energy and the pressure on fabric during bagging process. By comparing the simulations with the experimental test, it is found that the simulation can characterize the mechanical behavior of fabric during the bagging test with some deviations. The factors influencing the deviations are discussed.

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