Influence of specimen size on fracture toughness of sandstone when using SCB specimen
In order to investigate the effect of specimen size on the mode I fracture toughness using Semi-Circular Bend (SCB) specimen, we experimentally studied the fracture toughness using SCB and Short Rod (SR) specimens, both of which are International Society for Rock Mechanics (ISRM) suggested methods,...
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| Format: | Conference Paper |
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Engineers Australia
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/39218 |
| _version_ | 1848755531846516736 |
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| author | Funatsu, T Kuruppu, Mahinda |
| author2 | Raj Das |
| author_facet | Raj Das Funatsu, T Kuruppu, Mahinda |
| author_sort | Funatsu, T |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In order to investigate the effect of specimen size on the mode I fracture toughness using Semi-Circular Bend (SCB) specimen, we experimentally studied the fracture toughness using SCB and Short Rod (SR) specimens, both of which are International Society for Rock Mechanics (ISRM) suggested methods, for comparison. Fracture toughness of a strong sandstone having an unconfined compressive strength of 145 MPa was investigated. The test results revealed that the fracture toughness increased with specimen diameter and reached a limiting value. These experimental results further showed that the value of fracture toughness determined using SCB specimen is almost exactly the same as that using SR specimen, when the SCB specimen satisfies the minimum size requirement. However, SCB specimen being one without a chevron notch unlike SR specimen gives lower fracture toughness if the minimum size requirement is not satisfied. |
| first_indexed | 2025-11-14T08:57:47Z |
| format | Conference Paper |
| id | curtin-20.500.11937-39218 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:57:47Z |
| publishDate | 2014 |
| publisher | Engineers Australia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-392182023-02-27T07:34:32Z Influence of specimen size on fracture toughness of sandstone when using SCB specimen Funatsu, T Kuruppu, Mahinda Raj Das Sabu John size effects rock fracture mechanics semi-circular bend specimen fracture toughness In order to investigate the effect of specimen size on the mode I fracture toughness using Semi-Circular Bend (SCB) specimen, we experimentally studied the fracture toughness using SCB and Short Rod (SR) specimens, both of which are International Society for Rock Mechanics (ISRM) suggested methods, for comparison. Fracture toughness of a strong sandstone having an unconfined compressive strength of 145 MPa was investigated. The test results revealed that the fracture toughness increased with specimen diameter and reached a limiting value. These experimental results further showed that the value of fracture toughness determined using SCB specimen is almost exactly the same as that using SR specimen, when the SCB specimen satisfies the minimum size requirement. However, SCB specimen being one without a chevron notch unlike SR specimen gives lower fracture toughness if the minimum size requirement is not satisfied. 2014 Conference Paper http://hdl.handle.net/20.500.11937/39218 Engineers Australia restricted |
| spellingShingle | size effects rock fracture mechanics semi-circular bend specimen fracture toughness Funatsu, T Kuruppu, Mahinda Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title | Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title_full | Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title_fullStr | Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title_full_unstemmed | Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title_short | Influence of specimen size on fracture toughness of sandstone when using SCB specimen |
| title_sort | influence of specimen size on fracture toughness of sandstone when using scb specimen |
| topic | size effects rock fracture mechanics semi-circular bend specimen fracture toughness |
| url | http://hdl.handle.net/20.500.11937/39218 |