The Effect of Bending Rigidity upon Fabric Behaviour under In-plane Compression

Abstract

This paper presents the system to define fabric stiffness properties upon the geometry of the buckling wave when fabric strip is subjected to the increasing in-plane compression. The geometry of buckling wave is analyzed in terms of its height Hb and area Sb. For fabric specimen behaviour evaluation in such type of deformation it is proposed to record critical values of in-plane deformation - ΔLcr1 - at which the wave gains the maximum area Sbmax under buckling wave; ΔLcr2 - at which the wave gains the maximum height Hbmax of buckling wave; ΔLmax - at which the wave looses its stable orientation due to the changed location of its mass centre and leans over the horizontal plane. It was determined that mathematical equation Sb=p+qln(w/LB) can be used to express the relationship between buckling wave geometry and properties of the fabric specimen. The results of this investigation can be used in sewing processes automation or fabric performance evaluation.