Study on bending of woven fabrics using Linear Viscoelasticity Theory

Abstract

The bending behavior of woven fabrics under low curvature conditions has been analyzed by linear viscoclastic theory. The fabric is assumed to behave viscoelastically and to be subjected to frictional restraints in bending deformation. The frictional restraint is considered to be proportional to the curvature and can be described by a frictional moment. A model has been constructed by a standard three - element solid model and a paralleled frictional sliding clement. The equations of the model for a cyclic curvature variation are derived. A set of parameters of the equations for each fabric has been obtained experimentally. Predictions of the bending rigidity and hysteresis for wool, cashmere, wool/polyester blended, polyester and cotton fabrics are made, displaying very good agreement with the experimental observations.