NDLI: A creep constitutive model with variable parameters for thenardite

Content Provider	Springer Nature Link
Author	Wang, Junbao Liu, Xinrong Song, Zhanping Guo, Jianqiang Zhang, Qianqian
Copyright Year	2016
Abstract	Results from the triaxial creep tests indicate that the relationship between steady creep rate of thenardite and deviatoric stress can be described with the Heard model. By combining the Kelvin model which reflects the primary creep property of rock with the Heard steady creep model, a Kelvin–Heard (K-H) creep model is constructed. However, the predicted curves from the K-H model are not in good agreement with the creep test data of thenardite. To improve the prediction precision, it is assumed that the viscosity coefficient of thenardite increases over time in primary creep stage, and an improved K-H model is proposed. Compared with the K-H model, the improved K-H model can more precisely describe the creep behavior of thenardite under a certain stress state. However, each of its parameters G, η $_{∞}$, a and b has different values under different deviatoric stress levels. These four parameters all decrease with the increase in deviatoric stress, which is considered to establish an improved K-H model with variable parameters for thenardite finally. Comparison with the test data shows that this model can precisely predict the creep behavior of thenardite when 25 MPa ≤ σ $_{1}$ − σ $_{3}$ ≤ 40 MPa.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	11
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-06-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thenardite Creep model Variable parameters Prediction Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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