Stress relaxation experiments were performed on three types of thermal bonded nonwoven geotextiles in this study to model and predict their stress relaxation behaviors. Four mechanical models, including the standard linear solid mechanics model, Eyring’s model, the modified two-Maxwell-unit model and the modified three-Maxwell-unit model were used to predict stress values for 600 h based on 3 and 90 h experimental relaxation data. Results indicated that Eyring’s model and the modified three-Maxwell-unit model fitted the experimental results better than the other two. Estimation using modified three-Maxwell-unit model seemed to construct an upper bound while that using Eyring’s model form a lower bound for the corresponding experimental data. In addition, predicted curves were much closer to the experimental curve when equations of the two models were built with the 90 h experimental data than those data of 3 h. Thus, the prediction capability of the two models can be substantially improved by employing the data with longer time. In summary, the combination of the modified three-Maxwell-unit model and Eyring’s model can well forcast the range of actual stress during stress relaxation experiments with the longer term experimental data.

在本研究中，对三种类型的热粘合非织造土工布进行了应力松弛实验，以建模和预测其应力松弛行为。根据3和90 h实验弛豫数据，使用标准线性固体力学模型，Eyring模型，改良的2 Maxwell单元模型和改良的3 Maxwell单元模型这4种力学模型来预测600 h的应力值。结果表明，Eyring模型和改进的三麦克斯韦单位模型比其他两个模型更好地拟合了实验结果。使用改良的三麦克斯韦单位模型的估计似乎建立了一个上限，而使用艾林模型的估计则为相应的实验数据形成了一个下限。此外，当使用90 h实验数据建立两个模型的方程时，与3 h数据相比，预测曲线更接近实验曲线。因此，通过使用较长时间的数据，可以大大提高两个模型的预测能力。综上所述，修改后的三麦克斯韦单位模型和Eyring模型的组合可以很好地预测应力松弛实验期间的实际应力范围，并具有较长期的实验数据。