Research on the Whole Creep Process of the Generalized Kelvin Model Based on Damaged Body Elements

SONG Yanqi; LI Xiaolong; MA Hongfa; FU Hang

doi:10.21656/1000-0887.410255

Volume 42 Issue 6

Jun. 2021

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Article Navigation > Applied Mathematics and Mechanics > 2021 > 42(6): 637-644

SONG Yanqi, LI Xiaolong, MA Hongfa, FU Hang. Research on the Whole Creep Process of the Generalized Kelvin Model Based on Damaged Body Elements[J]. Applied Mathematics and Mechanics, 2021, 42(6): 637-644. doi: 10.21656/1000-0887.410255

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Research on the Whole Creep Process of the Generalized Kelvin Model Based on Damaged Body Elements

doi: 10.21656/1000-0887.410255

1. State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology(Beijing), Beijing 100083, P.R.China;
2. School of Mechanics and Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, P.R.China

Received Date: 2020-09-07
Rev Recd Date: 2020-11-20

Abstract

Abstract

The creep properties of rocks often have important control effects on the stability of tunnels and underground works. According to the stage characteristics of rock creep, the whole process of rock creep can be divided into 4 stages. The generalized Kelvin model can better reflect the rock creep characteristics of the 1st 3 stages, but cannot ideally reflect the characteristics of the accelerated creep stage. Through introduction of damaged body elements and Kachanov’s damage factor evolution formula, a generalized Kelvin model with damaged body elements was constructed, thereby a creep model was established to reflect the whole process of rock creep, and a relatively simple combined model parameter calculation method was proposed. The model well describes the whole process of rock creep, and the model parameters are easy to determine. The model works well in fitting and analysis of the experimental curves of sandy mudstone uniaxial compression creep, and the research results provides a reference for similar projects.
- step loading,
- generalized Kelvin model,
- damaged body element,
- accelerated creep,
- curve fitting

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References(14)

References

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