Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory
Abstract On the basis of the law of conservation of energy, the three stages of rock creep are analyzed. The reasons for the difficulty in studying the accelerated creep stage of rocks using the traditional creep model are expounded. The triaxial creep deformation law and critical point parameter va...
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| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-79354-7 |
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| author | Di Zhou Xiangjin Tian Shuguang Zhang Wang Zeng Minye Zhang Yanchao Feng Wenbo Liu Xiang Huang Mingzhuo Fan Ye Sun |
| author_facet | Di Zhou Xiangjin Tian Shuguang Zhang Wang Zeng Minye Zhang Yanchao Feng Wenbo Liu Xiang Huang Mingzhuo Fan Ye Sun |
| author_sort | Di Zhou |
| collection | DOAJ |
| description | Abstract On the basis of the law of conservation of energy, the three stages of rock creep are analyzed. The reasons for the difficulty in studying the accelerated creep stage of rocks using the traditional creep model are expounded. The triaxial creep deformation law and critical point parameter values of rocks are obtained by carrying out rock creep tests under different confining pressures. Based on strain energy theory, the law of conservation of energy, and Perzyna viscoplastic theory, a creep constitutive model, which can describe the whole process of primary creep, steady-state creep, and accelerated creep, is established. Results show that the model can well reflect the creep characteristics of rocks, especially when the load of rocks is greater than the long-term strength. It has an obvious effect on highlighting the accelerated creep stage of rocks. The fitting degree of the creep model curve and test curve is considerably greater than that of the Nishihara model curve and test curve. The model not only describes the whole process of rock primary creep, steady-state creep, and accelerated creep thoroughly but also compensates for the shortcomings of traditional models in describing accelerated creep. This model can provide a theoretical basis for further revealing the objective law of rock creep. |
| format | Article |
| id | doaj-art-a7dc5575d70d42ce98695f1c993e95b2 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-a7dc5575d70d42ce98695f1c993e95b22025-08-20T02:22:16ZengNature PortfolioScientific Reports2045-23222024-11-0114111510.1038/s41598-024-79354-7Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theoryDi Zhou0Xiangjin Tian1Shuguang Zhang2Wang Zeng3Minye Zhang4Yanchao Feng5Wenbo Liu6Xiang Huang7Mingzhuo Fan8Ye Sun9China Construction Fifth Engineering Division Corp., Ltd.China Construction Fifth Engineering Division Corp., Ltd.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of TechnologyChina Construction Fifth Engineering Division Corp., Ltd.China Construction Fifth Engineering Division Corp., Ltd.China Construction Fifth Engineering Division Corp., Ltd.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of TechnologyGuangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of TechnologyGuangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of TechnologyGuangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of TechnologyAbstract On the basis of the law of conservation of energy, the three stages of rock creep are analyzed. The reasons for the difficulty in studying the accelerated creep stage of rocks using the traditional creep model are expounded. The triaxial creep deformation law and critical point parameter values of rocks are obtained by carrying out rock creep tests under different confining pressures. Based on strain energy theory, the law of conservation of energy, and Perzyna viscoplastic theory, a creep constitutive model, which can describe the whole process of primary creep, steady-state creep, and accelerated creep, is established. Results show that the model can well reflect the creep characteristics of rocks, especially when the load of rocks is greater than the long-term strength. It has an obvious effect on highlighting the accelerated creep stage of rocks. The fitting degree of the creep model curve and test curve is considerably greater than that of the Nishihara model curve and test curve. The model not only describes the whole process of rock primary creep, steady-state creep, and accelerated creep thoroughly but also compensates for the shortcomings of traditional models in describing accelerated creep. This model can provide a theoretical basis for further revealing the objective law of rock creep.https://doi.org/10.1038/s41598-024-79354-7Conservation of energyStrain energy theoryPerzyna viscoplastic theoryAccelerated creepNishihara model curveLong-term strength |
| spellingShingle | Di Zhou Xiangjin Tian Shuguang Zhang Wang Zeng Minye Zhang Yanchao Feng Wenbo Liu Xiang Huang Mingzhuo Fan Ye Sun Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory Scientific Reports Conservation of energy Strain energy theory Perzyna viscoplastic theory Accelerated creep Nishihara model curve Long-term strength |
| title | Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| title_full | Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| title_fullStr | Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| title_full_unstemmed | Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| title_short | Viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| title_sort | viscoelastic plastic creep constitutive model based on energy conservation law and strain energy theory |
| topic | Conservation of energy Strain energy theory Perzyna viscoplastic theory Accelerated creep Nishihara model curve Long-term strength |
| url | https://doi.org/10.1038/s41598-024-79354-7 |
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