Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment
Under high stress, rock in the creep state is vulnerable to external impact load, causing the irreversible perturbation deformation of rock or even sudden failure. To explore the dynamic characteristics of sedimentary rock in the creep state, a siltstone specimen was experimentally studied using a n...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/7623086 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832561863515176960 |
|---|---|
| author | Wanpeng Huang Wenbin Xing Shaojie Chen Yang Liu Kai Wu |
| author_facet | Wanpeng Huang Wenbin Xing Shaojie Chen Yang Liu Kai Wu |
| author_sort | Wanpeng Huang |
| collection | DOAJ |
| description | Under high stress, rock in the creep state is vulnerable to external impact load, causing the irreversible perturbation deformation of rock or even sudden failure. To explore the dynamic characteristics of sedimentary rock in the creep state, a siltstone specimen was experimentally studied using a new type of experimental system for rock creep perturbation. Compared to the currently available equipment for studying rock dynamics, this new type of experimental system provides a long-term and stable high static stress to maintain the creep state of rock specimen. This is independent of power supply because it provides static stress by gravity load. Moreover, the equipment provides a dynamic impact load through the free fall of impact weights. This study shows that the perturbation deformation of sedimentary rock increased in two stages: decay phase and sustained development phase. When the static stress reached up to ~85% of the rock’s ultimate strength and the axial strain reached up to 80% of the ultimate failure strain, the rock became sensitive to impact load. This static stress level is basically the same as its long-term strength. With increasing impact strength, the increment curve of the rock creep perturbation deformation was transformed from the decay phase to the sustained development phase in advance, making the rock sensitive to external perturbation at a low static loading stress level. |
| format | Article |
| id | doaj-art-a5e34e78120b4127a57ed687ae454b74 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-a5e34e78120b4127a57ed687ae454b742025-02-03T01:24:07ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/76230867623086Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing EquipmentWanpeng Huang0Wenbin Xing1Shaojie Chen2Yang Liu3Kai Wu4State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaUnder high stress, rock in the creep state is vulnerable to external impact load, causing the irreversible perturbation deformation of rock or even sudden failure. To explore the dynamic characteristics of sedimentary rock in the creep state, a siltstone specimen was experimentally studied using a new type of experimental system for rock creep perturbation. Compared to the currently available equipment for studying rock dynamics, this new type of experimental system provides a long-term and stable high static stress to maintain the creep state of rock specimen. This is independent of power supply because it provides static stress by gravity load. Moreover, the equipment provides a dynamic impact load through the free fall of impact weights. This study shows that the perturbation deformation of sedimentary rock increased in two stages: decay phase and sustained development phase. When the static stress reached up to ~85% of the rock’s ultimate strength and the axial strain reached up to 80% of the ultimate failure strain, the rock became sensitive to impact load. This static stress level is basically the same as its long-term strength. With increasing impact strength, the increment curve of the rock creep perturbation deformation was transformed from the decay phase to the sustained development phase in advance, making the rock sensitive to external perturbation at a low static loading stress level.http://dx.doi.org/10.1155/2017/7623086 |
| spellingShingle | Wanpeng Huang Wenbin Xing Shaojie Chen Yang Liu Kai Wu Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment Advances in Materials Science and Engineering |
| title | Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment |
| title_full | Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment |
| title_fullStr | Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment |
| title_full_unstemmed | Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment |
| title_short | Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment |
| title_sort | experimental study on sedimentary rock s dynamic characteristics under creep state using a new type of testing equipment |
| url | http://dx.doi.org/10.1155/2017/7623086 |
| work_keys_str_mv | AT wanpenghuang experimentalstudyonsedimentaryrocksdynamiccharacteristicsundercreepstateusinganewtypeoftestingequipment AT wenbinxing experimentalstudyonsedimentaryrocksdynamiccharacteristicsundercreepstateusinganewtypeoftestingequipment AT shaojiechen experimentalstudyonsedimentaryrocksdynamiccharacteristicsundercreepstateusinganewtypeoftestingequipment AT yangliu experimentalstudyonsedimentaryrocksdynamiccharacteristicsundercreepstateusinganewtypeoftestingequipment AT kaiwu experimentalstudyonsedimentaryrocksdynamiccharacteristicsundercreepstateusinganewtypeoftestingequipment |