摘要
运用蠕变系数法和时间-应力等效原理分析塑料土工格栅的蠕变行为.运用时间-应力等效原理,可以由较高应力水平下较短时间的试验数据,通过沿时间轴的平移得到较低应力水平下材料的长期性能.计算结果表明,蠕变系数法和应力移位方法所得结果吻合良好.时间-应力等效原理适用于对塑料土工格栅长期蠕变性能进行加速表征.
The Creep coefficient method and the time-stress equivalence principle are used to investigate the creep behavior of plastic geogrids. According to the time-stress equivalence principle, the creep compliance vs, time curves at five different stress levels are determined and shifted along logarithmic time axis to get a master compliance curve at a given reference stress level. It is shown that the predictions made by creep coefficient method and the stress shift technique are agree well with each other. Thus the time-stress equivalence principle provides an accelerated characterization technique to evaluate the long-term creep properties of plastic geogrids.
出处
《武汉理工大学学报（交通科学与工程版）》
2006年第2期282-284,335,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目(批准号:10572123)
湖南省自然科学基金资助项目(批准号:05JJ30014)
教育部重点实验室开放课题资助(批准号:KF0502)
