A fractional viscoelastic-plastic creep damage model for salt rock considering temperature effect

被引：0
|
作者：
Zhang S. [1 ]
Liang W. [1 ,2 ]
Xiao N. [1 ]
Zhao D. [1 ]
Li J. [1 ]
Li C. [1 ]
机构：
[1] Key Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Shanxi, Taiyuan
[2] College of Mining Engineering, Taiyuan University of Technology, Shanxi, Taiyuan
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2022年 / 41卷 / SUPPLEMENT 2期
基金：
中国国家自然科学基金;
关键词：
creep model; fractional dashpot; rock mechanics; salt rock; temperature effect; triaxial creep test;
D O I：
10.13722/j.cnki.jrme.2021.1237
中图分类号：
学科分类号：
摘要：
The surrounding rock of salt caverns，being ideal locations for the storage of energy and disposal of nuclear waste，presents with significant creep deformation over a long period of time due to being continually affected by a combination of stress and temperature. To determine the effects of temperature and stress on the creep of salt rock，triaxial creep tests at varying conditions were conducted，the mechanisms of the effects of temperature and deviatoric stress at steady-state creep rate were determined，and fitting was conducted to obtain the parameters of steady state creep rate constitutive equation. The linear dashpot of the Maxwell model was replaced by a fractional Abel dashpot to establish a fractional Maxwell model that can be used to consider the effects of temperature. A new fractional viscoelastic-plastic creep damage model considering temperature was achieved by connecting the viscoplastic damage model to the fractional Maxwell model. The parameters of the creep damage model were extracted from the results of the experimental triaxial creep test using 1stOpt software. The theoretical model results and tests data were compared to determine the validity of the creep damage model. The new model can well simulate the creep deformation in whole evolution. © 2022 Academia Sinica. All rights reserved.
引用
收藏
页码：3189 / 3209
页数：20
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