Measurement and analysis of fatigue crack deformation on the macro- and micro-scale
The paper describes an experiment which performs in-situ loading of a small compact tension specimen in a scanning electron microscope. Images are collected throughout a number of successive loadincg cycles. These are then analysed using digital image correlation (DIC) in order to produce crack flan...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2015-06-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1452 |
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| _version_ | 1846145559286513664 |
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| author | D. Nowell S.J. O’Connor K.I. Dragnevski |
| author_facet | D. Nowell S.J. O’Connor K.I. Dragnevski |
| author_sort | D. Nowell |
| collection | DOAJ |
| description | The paper describes an experiment which performs in-situ loading of a small compact tension
specimen in a scanning electron microscope. Images are collected throughout a number of successive loadincg
cycles. These are then analysed using digital image correlation (DIC) in order to produce crack flank
displacements as a function of load. This data is then compared with a simple elastic approach, and it is concluded
that elastic-plastic analysis is required in order to accurately capture the displacements close to the crack tip. A
simple approach due to Pommier and Hamam is therefore employed. This gives a better representation of the
data, but predicts a variation of crack tip displacement, ?, which is difficult to explain from a physical perspective.
The need for a more sophisticated analysis of the data is therefore highlighted. |
| format | Article |
| id | doaj-art-c4f31d2cd33d4e2396f74c7bacd8024d |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2015-06-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-c4f31d2cd33d4e2396f74c7bacd8024d2024-12-02T05:48:06ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932015-06-01933Measurement and analysis of fatigue crack deformation on the macro- and micro-scaleD. NowellS.J. O’ConnorK.I. DragnevskiThe paper describes an experiment which performs in-situ loading of a small compact tension specimen in a scanning electron microscope. Images are collected throughout a number of successive loadincg cycles. These are then analysed using digital image correlation (DIC) in order to produce crack flank displacements as a function of load. This data is then compared with a simple elastic approach, and it is concluded that elastic-plastic analysis is required in order to accurately capture the displacements close to the crack tip. A simple approach due to Pommier and Hamam is therefore employed. This gives a better representation of the data, but predicts a variation of crack tip displacement, ?, which is difficult to explain from a physical perspective. The need for a more sophisticated analysis of the data is therefore highlighted.https://www.fracturae.com/index.php/fis/article/view/1452Crack Tip Displacements |
| spellingShingle | D. Nowell S.J. O’Connor K.I. Dragnevski Measurement and analysis of fatigue crack deformation on the macro- and micro-scale Fracture and Structural Integrity Crack Tip Displacements |
| title | Measurement and analysis of fatigue crack deformation on the macro- and micro-scale |
| title_full | Measurement and analysis of fatigue crack deformation on the macro- and micro-scale |
| title_fullStr | Measurement and analysis of fatigue crack deformation on the macro- and micro-scale |
| title_full_unstemmed | Measurement and analysis of fatigue crack deformation on the macro- and micro-scale |
| title_short | Measurement and analysis of fatigue crack deformation on the macro- and micro-scale |
| title_sort | measurement and analysis of fatigue crack deformation on the macro and micro scale |
| topic | Crack Tip Displacements |
| url | https://www.fracturae.com/index.php/fis/article/view/1452 |
| work_keys_str_mv | AT dnowell measurementandanalysisoffatiguecrackdeformationonthemacroandmicroscale AT sjoconnor measurementandanalysisoffatiguecrackdeformationonthemacroandmicroscale AT kidragnevski measurementandanalysisoffatiguecrackdeformationonthemacroandmicroscale |