Modeling the tensile properties of modal/polyurethane core spun yarn

The tensile properties of polyurethane filaments, Modal yarns and Modal/polyurethane core spun yarns were tested. The stress strain relationship of the yarns was analyzed using a nonlinear viscoelastic model. And a multinomial relationship between stress and strain was obtained.The stress_strain curves were fitted using least square method. The results show that the theoretical calculations agree well with the measured results very well.