Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology
In order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8889606 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567731036094464 |
|---|---|
| author | Jiawei Liu Haijian Su Hongwen Jing Chengguo Hu Qian Yin |
| author_facet | Jiawei Liu Haijian Su Hongwen Jing Chengguo Hu Qian Yin |
| author_sort | Jiawei Liu |
| collection | DOAJ |
| description | In order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test in this study. And uniaxial compression test was carried out on the rock-like specimens containing closed 3D-printing rough joint to study the effects of joint inclination and joint length on the mechanical properties (peak strength, peak strain, elastic modulus, and secant modulus), cracking process, and failure modes. Besides, digital image correlation (DIC) method and acoustic emission (AE) system are used to investigate the whole evolution process of strain fields and crack propagation during loading. It is found that the mechanical parameters decrease first and then go up as the joint inclination increases, while presenting a continuous downward trend with the increase of joint length. Inclination of 45° and the larger joint length bring more extensive reduction to mechanical properties of specimens. Specimens exhibit typical brittle failure characteristics. The failure mode of specimens affected by different joint inclination is tension-shear failure. And the joint scale rises; the failure mode of specimens changes from tensile failure to shear failure. Larger joint scale results in the longer prepeak fluctuation phase on axial stress-strain curves and more dispersed distribution of high-value AE counts. |
| format | Article |
| id | doaj-art-6bdea52018f74deeb50a82d724064505 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6bdea52018f74deeb50a82d7240645052025-02-03T01:00:38ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88896068889606Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing TechnologyJiawei Liu0Haijian Su1Hongwen Jing2Chengguo Hu3Qian Yin4State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaIn order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test in this study. And uniaxial compression test was carried out on the rock-like specimens containing closed 3D-printing rough joint to study the effects of joint inclination and joint length on the mechanical properties (peak strength, peak strain, elastic modulus, and secant modulus), cracking process, and failure modes. Besides, digital image correlation (DIC) method and acoustic emission (AE) system are used to investigate the whole evolution process of strain fields and crack propagation during loading. It is found that the mechanical parameters decrease first and then go up as the joint inclination increases, while presenting a continuous downward trend with the increase of joint length. Inclination of 45° and the larger joint length bring more extensive reduction to mechanical properties of specimens. Specimens exhibit typical brittle failure characteristics. The failure mode of specimens affected by different joint inclination is tension-shear failure. And the joint scale rises; the failure mode of specimens changes from tensile failure to shear failure. Larger joint scale results in the longer prepeak fluctuation phase on axial stress-strain curves and more dispersed distribution of high-value AE counts.http://dx.doi.org/10.1155/2020/8889606 |
| spellingShingle | Jiawei Liu Haijian Su Hongwen Jing Chengguo Hu Qian Yin Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology Advances in Civil Engineering |
| title | Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology |
| title_full | Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology |
| title_fullStr | Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology |
| title_full_unstemmed | Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology |
| title_short | Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology |
| title_sort | experimental study on the fracture evolution processof rock like specimens containing a closed roughjoint based on 3d printing technology |
| url | http://dx.doi.org/10.1155/2020/8889606 |
| work_keys_str_mv | AT jiaweiliu experimentalstudyonthefractureevolutionprocessofrocklikespecimenscontainingaclosedroughjointbasedon3dprintingtechnology AT haijiansu experimentalstudyonthefractureevolutionprocessofrocklikespecimenscontainingaclosedroughjointbasedon3dprintingtechnology AT hongwenjing experimentalstudyonthefractureevolutionprocessofrocklikespecimenscontainingaclosedroughjointbasedon3dprintingtechnology AT chengguohu experimentalstudyonthefractureevolutionprocessofrocklikespecimenscontainingaclosedroughjointbasedon3dprintingtechnology AT qianyin experimentalstudyonthefractureevolutionprocessofrocklikespecimenscontainingaclosedroughjointbasedon3dprintingtechnology |