Predicting the Biaxial Tensile Deformation Behavior of Spunbonded Nonwovens

Abstract

An analysis is presented to predict the biaxial tensile behavior of spun-bonded non woven fabrics using knowledge of the stress-strain behavior of their constituent fibers and their orientation angle distribution. Nonlinearity in fiber stress-strain behavior is considered in order to predict fabric stresses in the longitudinal and transverse direc tions under biaxial loading conditions. Only a special case of biaxial loading is con sidered in which the transverse strain is forced to be zero, i.e., strip biaxial loading conditions. Experimental results are obtained by evaluating four spunbonded fabrics on a Kawabata strip biaxial tester KES-G2 and are compared with the theoretical results.