Un modèle discret du couplage entre les fils dans une structure tisséeA discrete model for the coupling between the yarns in a woven fabric |
| |
Authors: | Bilel Ben Boubaker Bernard Haussy Jean-François Ganghoffer |
| |
Institution: | 1. ESEO, 4, rue Merlet de la Boulaye, BP 926, 49009 Angers cedex 01, France;2. LEMTA, UMR 7563, ENSEM, 2, avenue de la Forêt de Haye, BP 160, 54504 Vandoeuvre-lès-Nancy, France |
| |
Abstract: | The coupling between yarns in a piece of fabric has been analysed at the mesoscopic scale, in terms of its impact on the macroscopic unidirectional behaviour. Starting from a discrete model of a woven structure associated to a variational formulation of the equilibrium of the structure, the coupling between both yarns is introduced, the potential energy of which is calculated. The initial shape of the yarn, represented by a planar undulated beam supposed to be periodic, is described by a Fourier series. The coefficients of the series are expressed vs. the contact force exerted at the top of the undulations, and vs. the mechanical properties of the solicited yarn. The contact force is then expressed vs. the mechanical properties of the transverse yarn and vs. the vertical displacement of the contact point. The potential energy of the coupling is then built, assuming the continuity of the displacement at the contact points. The equilibrium shape of the yarn submitted to unidirectional traction is obtained numerically as the minimum of the total potential energy. The simulated traction curve reproduces in a satisfactorily manner the observed behaviour. The respective contributions of the flexional and extensional effects of the yarn are analysed. The consideration of the coupling enhances the rigidity of the response of the yarn; one demonstrates the effect of the geometrical and mechanical parameters of the transverse yarn. To cite this article: B. Ben Boubaker et al., C. R. Mecanique 331 (2003). |
| |
Keywords: | Solides et structures Structures tissées Modèles discrets Comportement mécanique Couplage entre les fils Courbe de traction Solids and structures Woven structures Discrete models Mechanical behaviour Coupling between yarns Traction behaviour |
本文献已被 ScienceDirect 等数据库收录! |
|