Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression
To study the effect of the loading rate change on the deformation and strength properties and creep behavior of mudstone, a series of uniaxial compression tests and graded loading creep tests was conducted on mudstone specimens at four loading rates (0.005, 0.05, 0.5, and 3 mm/min). The test result...
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| Format: | Article |
| Language: | English |
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SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2021-02-01
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| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5846 |
| _version_ | 1828320097067859968 |
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| author | LI Fu-lin YANG Jian LIU Wei-qun FAN Zhen-hua YANG Yu-gui |
| author_facet | LI Fu-lin YANG Jian LIU Wei-qun FAN Zhen-hua YANG Yu-gui |
| author_sort | LI Fu-lin |
| collection | DOAJ |
| description | To study the effect of the loading rate change on the deformation and strength properties and creep behavior of mudstone, a series of uniaxial compression tests and graded loading creep tests was conducted on mudstone specimens at four loading rates (0.005, 0.05, 0.5, and 3 mm/min). The test results find that the mudstone exhibits an obvious loading rate change effect, which is represented by an isotach viscosity behavior. When loading at a constant rate, different stress-strain relationships are observed and corresponded to different constant loading rates. When loading at variable rates, as the loading rate changes, the stress-strain relationships also change. In addition, the loading rate of mudstone prior to creep has a large impact on the creep deformation and creep rate. As the loading rate of mudstone increases before creep, the amount of creep deformation and creep rate show a gradually increasing trend. The mudstone creep rate shows a gradual decay trend over time, and the decay process can be divided into three phases: linear decay, logarithmic decay and stable decay. Furthermore, based on the three-component model and loading rate variation effect, an elasto- viscoplastic constitutive model was established. The developed constitutive model was used for the numerical modeling of mudstone laboratory tests. Compared the modeling results to the laboratory test results, it is found that the elasto-viscoplastic constitutive model can properly simulate the loading rate change effects on the mechanical properties of mudstone under uniaxial compression conditions. |
| first_indexed | 2024-04-13T18:06:55Z |
| format | Article |
| id | doaj.art-d4fd7235f67147bcab47e1a570928650 |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-13T18:06:55Z |
| publishDate | 2021-02-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-d4fd7235f67147bcab47e1a5709286502022-12-22T02:36:03ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-02-0142236937810.16285/j.rsm.2020.5846Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression LI Fu-lin0YANG Jian1LIU Wei-qun2FAN Zhen-hua3 YANG Yu-gui41. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China To study the effect of the loading rate change on the deformation and strength properties and creep behavior of mudstone, a series of uniaxial compression tests and graded loading creep tests was conducted on mudstone specimens at four loading rates (0.005, 0.05, 0.5, and 3 mm/min). The test results find that the mudstone exhibits an obvious loading rate change effect, which is represented by an isotach viscosity behavior. When loading at a constant rate, different stress-strain relationships are observed and corresponded to different constant loading rates. When loading at variable rates, as the loading rate changes, the stress-strain relationships also change. In addition, the loading rate of mudstone prior to creep has a large impact on the creep deformation and creep rate. As the loading rate of mudstone increases before creep, the amount of creep deformation and creep rate show a gradually increasing trend. The mudstone creep rate shows a gradual decay trend over time, and the decay process can be divided into three phases: linear decay, logarithmic decay and stable decay. Furthermore, based on the three-component model and loading rate variation effect, an elasto- viscoplastic constitutive model was established. The developed constitutive model was used for the numerical modeling of mudstone laboratory tests. Compared the modeling results to the laboratory test results, it is found that the elasto-viscoplastic constitutive model can properly simulate the loading rate change effects on the mechanical properties of mudstone under uniaxial compression conditions. http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5846sandstoneloading ratecreepgraded loadingviscous property |
| spellingShingle | LI Fu-lin YANG Jian LIU Wei-qun FAN Zhen-hua YANG Yu-gui Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression Rock and Soil Mechanics sandstone loading rate creep graded loading viscous property |
| title | Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| title_full | Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| title_fullStr | Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| title_full_unstemmed | Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| title_short | Effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| title_sort | effect of loading rate change on the mechanical properties of mudstone under uniaxial compression |
| topic | sandstone loading rate creep graded loading viscous property |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5846 |
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