Effects of bedding planes on the fracture characteristics of coal under dynamic loading
To investigate the influence of bedding planes on its fracture characteristics under dynamic loading, testing and numerical simulations are carried out on semi-circular bend specimens of coal. It is shown that the fracture load and dynamic initiation fracture toughness decrease as the increase of be...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
PERGAMON-ELSEVIER SCIENCE LTD
2021
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| Online Access: | http://hdl.handle.net/20.500.11937/85067 |
| _version_ | 1848764711674314752 |
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| author | Wang, W. Zhao, Y. Sun, Z. Lu, Chunsheng |
| author_facet | Wang, W. Zhao, Y. Sun, Z. Lu, Chunsheng |
| author_sort | Wang, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | To investigate the influence of bedding planes on its fracture characteristics under dynamic loading, testing and numerical simulations are carried out on semi-circular bend specimens of coal. It is shown that the fracture load and dynamic initiation fracture toughness decrease as the increase of bedding-plane angle. The crack propagation direction is jointly controlled by the maximum principal stress and bedding planes. Based on the digital speckle correlation method, it is found out that, due to stress concentration, strain at the initial loading stage concentrates around crack tip. After crack initiation, there is a specific strain gradient with a candle flame-like shape on the surface of a specimen. The opening displacements at crack tip can be divided into stable and linearly increasing phases. Further, a continuum-based discrete element method is applied to virtually reproduce these fracture characteristics, which are instructive to study dynamic anisotropy in fracture of coal. |
| first_indexed | 2025-11-14T11:23:42Z |
| format | Journal Article |
| id | curtin-20.500.11937-85067 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:23:42Z |
| publishDate | 2021 |
| publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-850672021-11-10T07:26:31Z Effects of bedding planes on the fracture characteristics of coal under dynamic loading Wang, W. Zhao, Y. Sun, Z. Lu, Chunsheng Science & Technology Technology Mechanics Coal Bedding planes Dynamic loading Fracture characteristics SEMICIRCULAR BEND TECHNIQUE STRAIN-GAUGE METHOD MODE-I TOUGHNESS ANISOTROPY TENSILE-STRENGTH RATE DEPENDENCE SPECIMEN PROPAGATION ROCKS PARAMETERS To investigate the influence of bedding planes on its fracture characteristics under dynamic loading, testing and numerical simulations are carried out on semi-circular bend specimens of coal. It is shown that the fracture load and dynamic initiation fracture toughness decrease as the increase of bedding-plane angle. The crack propagation direction is jointly controlled by the maximum principal stress and bedding planes. Based on the digital speckle correlation method, it is found out that, due to stress concentration, strain at the initial loading stage concentrates around crack tip. After crack initiation, there is a specific strain gradient with a candle flame-like shape on the surface of a specimen. The opening displacements at crack tip can be divided into stable and linearly increasing phases. Further, a continuum-based discrete element method is applied to virtually reproduce these fracture characteristics, which are instructive to study dynamic anisotropy in fracture of coal. 2021 Journal Article http://hdl.handle.net/20.500.11937/85067 10.1016/j.engfracmech.2021.107761 English PERGAMON-ELSEVIER SCIENCE LTD restricted |
| spellingShingle | Science & Technology Technology Mechanics Coal Bedding planes Dynamic loading Fracture characteristics SEMICIRCULAR BEND TECHNIQUE STRAIN-GAUGE METHOD MODE-I TOUGHNESS ANISOTROPY TENSILE-STRENGTH RATE DEPENDENCE SPECIMEN PROPAGATION ROCKS PARAMETERS Wang, W. Zhao, Y. Sun, Z. Lu, Chunsheng Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title | Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title_full | Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title_fullStr | Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title_full_unstemmed | Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title_short | Effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| title_sort | effects of bedding planes on the fracture characteristics of coal under dynamic loading |
| topic | Science & Technology Technology Mechanics Coal Bedding planes Dynamic loading Fracture characteristics SEMICIRCULAR BEND TECHNIQUE STRAIN-GAUGE METHOD MODE-I TOUGHNESS ANISOTROPY TENSILE-STRENGTH RATE DEPENDENCE SPECIMEN PROPAGATION ROCKS PARAMETERS |
| url | http://hdl.handle.net/20.500.11937/85067 |