A Thermo-elasto-plastic Constitutive Model of the Rock underthe Temperature Effect and Its Numerical Implementation
[1]JIA Shan-po,LIN Jian-pin,LlU Tuan-hui,et al.A Thermo-elasto-plastic Constitutive Model of the Rock underthe Temperature Effect and Its Numerical Implementation[J].Journal of Zhengzhou University (Engineering Science),2015,36(02):52-56.[doi:10.3969/j.issn.1671-6833.2015.02.012]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 02
Page number:
52-56
Column:
Public date:
2015-04-30
- Title:
- A Thermo-elasto-plastic Constitutive Model of the Rock underthe Temperature Effect and Its Numerical Implementation
- CLC:
- TU457
- Abstract:
- Further study of the mechanism and law of rock deformation and breakage under the temperatureeffect has great significance to the safety and stability of the underground rock engineering. Based on the evo-lution characteristics of rock mechanics parameters under the temperature effect,a new thermo-elasto-plasticconstitutive model with improved Mohr-Coulomb criterion is presented,which can depict the temperature effectand softening behaviours of the rock. The main contents of the implicit constitutive integration algorithm arediscussed systematically; and the consistent stiffness matrix is deduced. Based on the implicit Euler stress in-tegration algorithm,the UMAT subroutine of the model is developed in ABAQUS. The numerical simulationunder various stress states and temperatures shows that the numerical simulations agree with the experimentalrules and the proposed model is able to depict effectively the main features of brittle-plastic transition of rock.
- References:
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