考虑初始损伤和残余强度的岩石变形过程模拟

温韬; 唐辉明; 马俊伟; 张俊荣; 范志强

doi:10.3799/dqkx.2018.212

Volume 44 Issue 2

Feb. 2019

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Wen Tao, Tang Huiming, Ma Junwei, Zhang Junrong, Fan Zhiqiang, 2019. Deformation Simulation for Rock in Consideration of Initial Damage and Residual Strength. Earth Science, 44(2): 652-663. doi: 10.3799/dqkx.2018.212

Citation:

Wen Tao, Tang Huiming, Ma Junwei, Zhang Junrong, Fan Zhiqiang, 2019. Deformation Simulation for Rock in Consideration of Initial Damage and Residual Strength. Earth Science, 44(2): 652-663. doi: 10.3799/dqkx.2018.212

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Deformation Simulation for Rock in Consideration of Initial Damage and Residual Strength

doi: 10.3799/dqkx.2018.212

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
2.
Three Gorges Research Center for Geohazards, Ministry of Education, China University of Geosciences, Wuhan 430074, China

Received Date: 2018-05-05
Publish Date: 2019-02-15

Abstract

Abstract

Aiming at the limitations of previous rock damage constitutive models, a comprehensive simulation method of rock deformation to present simultaneously initial damage and residual strength is developed. With consideration of the initial damage of rock and the fact that the damage portion still can bear certain stress, deformation mechanism models of each portion are established by decomposing rock materials into three portions, undamaged material, damaged material and micro-defects. Firstly, on the basis of geometry conditions and micro-force for rocks, the strain analysis for undamaged material is proposed. Meanwhile, considering that the deformation energy of rock is only related to damaged material, the strain analysis for damaged material is developed. Then, discussing the relationships between damage evolution and energy dissipation, and putting forward a damage evolution model to reflect the initial damage for rocks, a rock damage constitutive model to simulate the complete processes of deformation for rocks is established based on the strain analysis and the determination methods of model parameters are also provided. The results show that damage evolution model not only reflects the initial damage for rocks, but also presents the rock deformation stages. Compared with previous models, the proposed damage constitutive model is more consistent with the experimental curve. In addition, the proposed model reflects the complete processes of deformation for rocks, and presents intuitively the characteristics of the initial damage and the residual strength. Thus, the superiority of the model is validated.
- rock,
- closure stage,
- initial damage,
- residual strength,
- constitutive model

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References(51)

References

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Deformation Simulation for Rock in Consideration of Initial Damage and Residual Strength

doi: 10.3799/dqkx.2018.212

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