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Accelerated creep model based on the law of energy conservation and analysis of creep parameters

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Abstract

This study presents a model to accurately describe the nonlinear deformation pattern of rock creep damage process by incorporating energy principles. The model captures the accelerated creep deformation pattern by considering the relationship between time and creep parameters at each stage of rock creep. A nonlinear creep model based on energy conservation is developed by integrating the time-dependent creep parameters into the model. The identified parameters of the model are compared to validate its feasibility and accuracy. The correlation coefficient between the fitted curve and the test curve exceeds 0.90, confirming the validity of the nonlinear creep energy damage model. Utilizing the energy conservation law, the model effectively characterizes the damage evolution throughout the whole creep process and accurately represents the nonlinear deformation behavior during the accelerated creep stage of rocks. Compared with the Nishihara model, the model presented in this study demonstrates a better fit with the test curve, serving as a novel approach for creep modeling.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 42067041) and the Guangxi Natural Science Foundation (Grant No. 2020GXNSFAA159125).

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Authors and Affiliations

  1. Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin, 541004, China

    Wenbo Liu & Shuguang Zhang

  2. School of Civil Engineering Guilin University of Technology, Guilin, 541004, China

    Wenbo Liu & Shuguang Zhang

  3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China

    Wenbo Liu

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  1. Wenbo Liu
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  2. Shuguang Zhang
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Contributions

Wenbo Liu: Conceptualization, data curation, writing-original draft, investigation, and methodology. Shuguang Zhang: Conceptualization, data curation, methodology, and investigation.

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Correspondence to Shuguang Zhang.

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Liu, W., Zhang, S. Accelerated creep model based on the law of energy conservation and analysis of creep parameters. Mech Time-Depend Mater 28, 227–254 (2024). https://doi.org/10.1007/s11043-023-09628-6

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