热力学浅析纤维的粘弹性

Analysis of Fibre Viscoelastic Character by Thermodynamics Theory

本文根据热力学理论——应力起源于应变时内能和熵的变化,分析了纤维的弹性主要由于熵的变化而产生,它取决于纤维的取向度,并从纤维粘弹性测试数据即应力松弛、急缓回弹及拉伸应变回复率等加以论证。

According to the thermodynamics theory,the stress arises from the changes of internal energyand entropy with respect to strain,and the elasticity of fibre is derived mainly from the change ofentropy which depends on the degree of orientation of fibre.It have been verified by the experi-ment of fibre's viscoelasticity,i.e,the relaxation of stress,instantaneous e|asticity,delayed ela-sticity,stretching strain resiliance and so on.