通过拉伸试验，分别考虑涂层的影响以及拉伸时间、拉伸速度、黏弹性应力与反作用力对初始应力的影响，建立了改进后的热塑性聚氨酯复合纤维布料及其单股纤维束的超弹性本构模型和黏弹性本构模型，预测了拉伸过程的应力-应变和应力松弛曲线，并与试验结果进行对比。结果表明：建立的超弹性本构模型能较准确地预测布料及其单股纤维束的应力-应变曲线，相对误差不超过3.5%；黏弹性本构模型能较准确地预测布料的应力松弛曲线，相对误差不超过3.21%。

Considering the effects of coating, and the effects of tensile time, tensile rate, viscoelastic stress and reaction force on initial stress, the improved hyperelastic constitutive and viscoelastic constitutive model of thermoplastic polyurethane composite fabric and a single fiber bundle were established by tensile test. The stress-strain and stress relaxation curves during the tensile process were predicted and compared with the test results. The results show that the established hyperelastic constitive model could accurately predict the stress-strain curve of the fabric and the single fiber bundle, and the realtive errors were less than 3.5%. The viscoelastic constitutive model could accurately predict the stress relaxation curve of the fabric, and the relative error was less than 3.21%.