Variable parameters creep damage model of loess based on fractional calculus

被引：6

作者：

Tang, Hao ^{[1
,2
]}

Wang, Dongpo ^{[1
]}

Duan, Zhao ^{[3
]}

Zhao, Fasuo ^{[2
]}

Song, Fei ^{[2
]}

Qi, Di ^{[2
]}

机构：

[1] State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu

[2] School of Geology Engineering and Geomatics, Chang'an University, Xi'an

[3] College of Geology and Environment, Xi'an University of Science and Technology, Xi'an

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2015年 / 46卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Damage; Loess; Model; Nonlinear; SN element; Soft-matter element;

D O I：

10.11817/j.issn.1672-7207.2015.11.036

中图分类号：

学科分类号：

摘要：

Triaxial creep test was performed on the Xianyang Q2 loess specimen at different moisture contents with multi-staged loading condition to obtain the creep curves of the loess material for better characterization on its rheological properties. A four-element creep model containing soft-matter element was selected to simulate the rheology of loess specimen. On the basis of the variable parameter Newton element with the application of SN element and damage variables for stress level, times and moisture content, the proposed creep model reflected the nonlinear rheological and damage characteristics of loess specimen was obtained by modifying two constant parameters in the soft-matter elements of the conventional four-elements creep model into variable parameters. The proposed creep model was validated by experimental results. The results show that the model can well characterize the rheological properties of loess specimen. © 2015, Central South University of Technology. All right reserved.

引用

页码：4248 / 4255

页数：7

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