Transition Threshold of Granite Mechanical Characteristics at High Temperature
No unified criterion exists for the transition threshold of rock mechanical characteristics. We combine rock stress-strain curves to propose an increment ratio of axial pressure based on uniaxial compression tests on granite at high temperature. The behavior of the increment ratio of strain, elastic...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8846376 |
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| _version_ | 1850170069772926976 |
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| author | Hongjun Guo Ming Ji Dapeng Liu |
| author_facet | Hongjun Guo Ming Ji Dapeng Liu |
| author_sort | Hongjun Guo |
| collection | DOAJ |
| description | No unified criterion exists for the transition threshold of rock mechanical characteristics. We combine rock stress-strain curves to propose an increment ratio of axial pressure based on uniaxial compression tests on granite at high temperature. The behavior of the increment ratio of strain, elastic modulus, Poisson’s ratio, and energy with axial pressure is analyzed, and the following conclusions are drawn. (1) High temperatures aggravate rock deterioration, reduce failure strength, and enhance ductility characteristics. (2) Under loading, the compression-to-elasticity and elasticity-to-plasticity transition thresholds for rock occur, respectively, at 20%–35% and 75%–80% stress levels at temperatures of 25–800°C. (3) The source data for calculating rock deformation parameters or unloading points for unloading tests can be selected over the stress level range of 35%–75%. |
| format | Article |
| id | doaj-art-ad66a2d9c05c4d17884a0932c8b52109 |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ad66a2d9c05c4d17884a0932c8b521092025-08-20T02:20:34ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88463768846376Transition Threshold of Granite Mechanical Characteristics at High TemperatureHongjun Guo0Ming Ji1Dapeng Liu2Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaJiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, ChinaNo unified criterion exists for the transition threshold of rock mechanical characteristics. We combine rock stress-strain curves to propose an increment ratio of axial pressure based on uniaxial compression tests on granite at high temperature. The behavior of the increment ratio of strain, elastic modulus, Poisson’s ratio, and energy with axial pressure is analyzed, and the following conclusions are drawn. (1) High temperatures aggravate rock deterioration, reduce failure strength, and enhance ductility characteristics. (2) Under loading, the compression-to-elasticity and elasticity-to-plasticity transition thresholds for rock occur, respectively, at 20%–35% and 75%–80% stress levels at temperatures of 25–800°C. (3) The source data for calculating rock deformation parameters or unloading points for unloading tests can be selected over the stress level range of 35%–75%.http://dx.doi.org/10.1155/2020/8846376 |
| spellingShingle | Hongjun Guo Ming Ji Dapeng Liu Transition Threshold of Granite Mechanical Characteristics at High Temperature Advances in Civil Engineering |
| title | Transition Threshold of Granite Mechanical Characteristics at High Temperature |
| title_full | Transition Threshold of Granite Mechanical Characteristics at High Temperature |
| title_fullStr | Transition Threshold of Granite Mechanical Characteristics at High Temperature |
| title_full_unstemmed | Transition Threshold of Granite Mechanical Characteristics at High Temperature |
| title_short | Transition Threshold of Granite Mechanical Characteristics at High Temperature |
| title_sort | transition threshold of granite mechanical characteristics at high temperature |
| url | http://dx.doi.org/10.1155/2020/8846376 |
| work_keys_str_mv | AT hongjunguo transitionthresholdofgranitemechanicalcharacteristicsathightemperature AT mingji transitionthresholdofgranitemechanicalcharacteristicsathightemperature AT dapengliu transitionthresholdofgranitemechanicalcharacteristicsathightemperature |