Simulation of non-coaxial characteristics of sandy soil based on state-dependent constitutive model

被引：0
|
作者：
Chen Z.-Q. [1 ,2 ]
Huang M.-S. [1 ,2 ]
机构：
[1] Department of Geotechnical Engineering, Tongji University, Shanghai
[2] Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai
来源：
Huang, Mao-Song (mshuang@tongji.edu.cn) | 1959年 / Academia Sinica卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Hollow cylindrical shear tests; Non-coaxiality; Sandy soil; State-dependent constitutive model;
D O I：
10.16285/j.rsm.2017.07.015
中图分类号：
学科分类号：
摘要：
A non-coaxial constitutive model is proposed based on the Gram-Schmidt orthogonalization process employed in the yield vertex non-coaxial theory. The flow rule is revised in this model. The model corrects the original flow rule, where the non-coaxial flow direction is defined as the projection of the unit stress increment direction in the orthogonal direction of the reference principal stress, and is associated with the plastic scalar factor. In addition, a new form of plastic function is derived according to the dilatancy equation in the generalized stress state. Based on the state-related sand model, the new non-coaxial model and the uncorrected model are used to simulate the hollow cylindrical single shear test and the hollow cylindrical torsional shear test on Toyoura sand. The simulation results are compared with the experimental data, and the results show that new non-coaxial model can more reasonably reflect the non-coaxial phenomenon and its variation in the test, especially for the monotonic shear test in the direction of the fixed principal stress axis. © 2017, Science Press. All right reserved.
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页码：1959 / 1966
页数：7
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