应用非线性三组分模型模拟聚合物-合金土工格室板材的加速蠕变行为

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2024-09-13 DOI:10.1016/j.geotexmem.2024.09.005
Yang Zhao , Hanqing Xiao , Ling Chen , Penghui Chen , Zheng Lu , Chuxuan Tang , Hailin Yao
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引用次数: 0

摘要

聚合物合金土工格室板(PAGS)是一种新型土工格室材料,旨在取代传统的土工格室材料。加速蠕变试验是一种方便、精确的性能评估方法,是获得长期蠕变应变的传统蠕变试验的可行替代方法。然而,目前还缺乏对加速蠕变试验的预测和深入探讨。本文旨在评估使用非线性三组分(NLTC)模型模拟 PAGS 加速蠕变行为的有效性。通过比较阶跃等温法(SIM)加速蠕变实验测试和数值模拟,对 NLTC 模型的预测准确性进行了评估。随后,利用经过验证的 NLTC 模型模拟了时间-温度叠加法(TTSM)、时间-应力叠加法(TSSM)和阶跃等应力法(SSM)加速蠕变试验,从而验证了该模型在预测所有加速蠕变试验方面的有效性。结果表明,NLTC 模型能有效模拟温度升高引起的蠕变变形,尤其是温度低于 41 ℃ 时。虽然在温度升高时会出现一些误差,但误差在 17.4% 的可接受范围内。TTSM、TSSM 和 SSM 试验的数值模拟结果也表明,该模型能够熟练模拟温度和蠕变载荷增加引起的加速蠕变行为。
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Application of the non-linear three-component model for simulating accelerated creep behavior of polymer-alloy geocell sheets

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.

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来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
期刊最新文献
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