复合弹性非织造材料拉伸力学分析

With the development of composite elastic nonwoven material are used more and more widely, the studies of its tensile mechanical properties have become increasingly important. In this paper, based on the basic linear viscoelastic model, I build the composite elastic material structure model, and by model analysis I obtained: the structural specialty gives material a special mechanical performance. This type of elastic combination material experiences a more complicated stress-strain course in low distortion area which is different from the tensile strain course of common textile material. Then, this dissertation establishes the viscoelastic mechanics model for this course. Through function fitting and analysis a conclusion can be gotten, namely, the elastic performance of elastic combination material is supplied by elastic film, but the structure of combination material limits the elasticity of the elastic film and make it work only in low distortion condition; nonwoven layer has the crucial effect on the breaking strength and the ultimate elongation of the elastic combination material.