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Volume 27 Issue 4
Jul 2016
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Journal of Earth Science  > 2016  >  27(4): 677-685.
Xingang Wang, Bin Hu, Huiming Tang, Xinli Hu, Jiading Wang, Lei Huang. A Constitutive Model of Granite Shear Creep under Moisture. Journal of Earth Science, 2016, 27(4): 677-685. doi: 10.1007/s12583-016-0709-1
Citation: Xingang Wang, Bin Hu, Huiming Tang, Xinli Hu, Jiading Wang, Lei Huang. A Constitutive Model of Granite Shear Creep under Moisture. Journal of Earth Science, 2016, 27(4): 677-685. doi: 10.1007/s12583-016-0709-1
shu

A Constitutive Model of Granite Shear Creep under Moisture

doi: 10.1007/s12583-016-0709-1
  • 1.

    State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China

  • 2.

    Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

More Information
  • Corresponding author: Xingang Wang, 328602223@qq.com
  • Received Date: 30 Nov 2014
  • Accepted Date: 17 Aug 2015
  • Publish Date: 12 Jul 2016
    Abstract
  • Previous constitutive models of granite shear creep have two limitations: (1) although moisture greatly affects granite shear creep behavior, currently there are no constitutive models that include this factor; (2) there are also no models that include an acceleration stage. This paper presents an improved Burgers constitutive model with the addition of a damage parameter to characterize the moisture effect and uses a nonlinear relation equation between stress and strain for inclusion as the acceleration stage. The damage parameter is determined from granite creep experiment under four different moisture contents (0%, 0.22%, 0.49%, and 0.79%). The nonlinear relation equation is obtained by fitting a dataset of stain versus time under five different loading stages. To verify the presented model, a creep experiment was conducted on other granite samples and the results show that the model agrees well with the experimental observation data.

     

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