十字形PTT与PET长丝的力学性能模型

对长丝之间的力学作用进行了模型建立和分析,利用四元件模型对十字形PTT和PET长丝的蠕变行为分别进行力学阐述,得出了长丝的力学参数:弹性模量、黏滞系数。利用这些微观参数验证长丝的应力松弛行为,得到与宏观表现较为合理的相似性。四元件模型从理论上对长丝的力学性能进行了表征,不仅可描述长丝的急弹性、缓弹性变形,还可同时验证长丝的塑性变形,更优于三元件模型。

Models of mechanical properties of the cross section PTT filament and PET filament

A model was developed to analyze the inter-filament mechanical function,and the creep of the cross section PTT and PET filaments was expatiated by four element models.The mechanical parameters of the filaments such as elasticity module and viscosity coefficient were got,which were used to validate the stress slack of the filaments,showing in good accord with the macro performance of the filaments.It can be seen that the four element models can be applied to character exactly the mechanical properties of the filaments in theory.It can describe the rapid elasticity and slow elasticity of the filaments and verify their creep,and is advantageous over the three element models.