The polymer-alloy geocell sheets (PAGS) represent a novel geocell material developed to replace conventional geocell materials. Accelerated creep testing, a convenient and precise performance evaluation method, presents a viable alternative to traditional creep testing for obtaining long-term creep strains. Nonetheless, there is a lack of prediction and in-depth exploration of accelerated creep testing. This paper aims to assess the efficacy of using the non-linear three-component (NLTC) model to simulate the accelerated creep behavior of PAGS. The predictive accuracy of the NLTC model has undergone evaluation through a comparison between stepped isothermal method (SIM) accelerated creep experimental tests and numerical simulations. Subsequently, the validated NLTC model was employed to simulate the time-temperature superposition method (TTSM), time-stress superposition method (TSSM), and stepped isostress method (SSM) accelerated creep tests, thereby verifying its effectiveness in predicting all accelerated creep tests. The results indicate that the NLTC model can effectively simulate creep deformation induced by temperature increases, particularly the temperatures below 41 °C. Although some errors are observed at elevated temperatures, it is within the acceptable range of 17.4%. Numerical simulation results of TTSM, TSSM, and SSM tests also suggest the model's proficiency in simulating the accelerated creep behavior by temperature and creep load increasing.

中文翻译：

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非线性三组分模型在聚合物合金土工室板加速蠕变行为中的应用


聚合物合金土工格室片 （PAGS） 代表了一种新型土工室材料，旨在取代传统的土工室材料。加速蠕变测试是一种方便而精确的性能评估方法，为获得长期蠕变应变提供了传统蠕变测试的可行替代方案。尽管如此，目前还缺乏对加速蠕变测试的预测和深入探索。本文旨在评估使用非线性三分量 （NLTC） 模型模拟 PAGS 加速蠕变行为的有效性。通过阶梯等温法 （SIM） 加速蠕变实验试验和数值模拟的比较，评估了 NLTC 模型的预测精度。随后，采用经过验证的 NLTC 模型模拟时间-温度叠加法 （TTSM）、时间-应力叠加法 （TSSM） 和阶梯等应力法 （SSM） 加速蠕变试验，从而验证其预测所有加速蠕变试验的有效性。结果表明，NLTC模型可以有效地模拟温度升高引起的蠕变变形，特别是低于41 °C的温度。 尽管在高温下观察到一些误差，但它在 17.4% 的可接受范围内。TTSM、TSSM 和 SSM 测试的数值模拟结果也表明，该模型能够熟练地模拟温度和蠕变载荷增加引起的加速蠕变行为。