Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress
During the mining of deep mineral resources, the rock is in the complex mechanical environment of high crustal stress and blasting excavation unloading, and the improved SHPB test system is used to carry out frequent impact disturbance test of deep rock in the process of unloading high static stress...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Complexity |
| Online Access: | http://dx.doi.org/10.1155/2020/2706091 |
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| author | Chun Wang Shuai-fei Zhan Mei-zhi Xie Cheng Wang Lu-ping Cheng Zu-qiang Xiong |
| author_facet | Chun Wang Shuai-fei Zhan Mei-zhi Xie Cheng Wang Lu-ping Cheng Zu-qiang Xiong |
| author_sort | Chun Wang |
| collection | DOAJ |
| description | During the mining of deep mineral resources, the rock is in the complex mechanical environment of high crustal stress and blasting excavation unloading, and the improved SHPB test system is used to carry out frequent impact disturbance test of deep rock in the process of unloading high static stress. Firstly, the general characteristics of dynamic stress-strain curve envelope of the whole process trend can be divided into four stages: the stable development stage of micro cracks, the non-stable development stage of micro cracks, the fatigue damage stage, and the fatigue failure stage. Then, the damage variables of the rock are defined by continuous factors, strain equivalence principle and statistical damage theory, which are based on the whole deformation characteristics of rock during the test. And the derived damage variable equation of rock in the damage process is proved to be reasonable, and the damage constitutive model of rock under frequent disturbances in the process of unloading high static stress is established by the combined model method. Finally, the rationality of constitutive equation is verified by test data, which shows that the dynamic stress-strain curve envelope is in good consistency with the theoretical curve of constitutive equation. |
| format | Article |
| id | doaj-art-ecee46b1e39e42ceb74ed080014fa248 |
| institution | Kabale University |
| issn | 1076-2787 1099-0526 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Complexity |
| spelling | doaj-art-ecee46b1e39e42ceb74ed080014fa2482025-02-03T06:45:59ZengWileyComplexity1076-27871099-05262020-01-01202010.1155/2020/27060912706091Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static StressChun Wang0Shuai-fei Zhan1Mei-zhi Xie2Cheng Wang3Lu-ping Cheng4Zu-qiang Xiong5School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaGuangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning, Guangxi 530029, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaDuring the mining of deep mineral resources, the rock is in the complex mechanical environment of high crustal stress and blasting excavation unloading, and the improved SHPB test system is used to carry out frequent impact disturbance test of deep rock in the process of unloading high static stress. Firstly, the general characteristics of dynamic stress-strain curve envelope of the whole process trend can be divided into four stages: the stable development stage of micro cracks, the non-stable development stage of micro cracks, the fatigue damage stage, and the fatigue failure stage. Then, the damage variables of the rock are defined by continuous factors, strain equivalence principle and statistical damage theory, which are based on the whole deformation characteristics of rock during the test. And the derived damage variable equation of rock in the damage process is proved to be reasonable, and the damage constitutive model of rock under frequent disturbances in the process of unloading high static stress is established by the combined model method. Finally, the rationality of constitutive equation is verified by test data, which shows that the dynamic stress-strain curve envelope is in good consistency with the theoretical curve of constitutive equation.http://dx.doi.org/10.1155/2020/2706091 |
| spellingShingle | Chun Wang Shuai-fei Zhan Mei-zhi Xie Cheng Wang Lu-ping Cheng Zu-qiang Xiong Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress Complexity |
| title | Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress |
| title_full | Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress |
| title_fullStr | Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress |
| title_full_unstemmed | Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress |
| title_short | Damage Characteristics and Constitutive Model of Deep Rock under Frequent Impact Disturbances in the Process of Unloading High Static Stress |
| title_sort | damage characteristics and constitutive model of deep rock under frequent impact disturbances in the process of unloading high static stress |
| url | http://dx.doi.org/10.1155/2020/2706091 |
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