Measurement and analysis of fatigue crack deformation at the micro-scale
This paper introduces the use of digital image correlation for the measurement of surface displacements in the neighbourhood of a crack tip, both at the macro- and micro- scale. Various methods of interpreting the measured data and producing a crack driving force are then discussed, including the u...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2017-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_27.pdf |
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| author | D. Nowell K.I. Dragnevski S.J. O’Connor |
| author_facet | D. Nowell K.I. Dragnevski S.J. O’Connor |
| author_sort | D. Nowell |
| collection | DOAJ |
| description | This paper introduces the use of digital image correlation for the measurement of surface displacements in the neighbourhood of a crack tip, both at the macro- and micro- scale. Various methods of interpreting the measured data and producing a crack driving force are then discussed, including the use of the full CJP model. A reduced set of parameters are then proposed, corresponding to the three principal interaction forces between the plastic enclave and the surrounding elastic material. Our own results, and those of Vasco Olmo, previously reported in the literature are then reanalysed using this new framework, and excellent agreement between two independent experiments is obtained. Implications for the analysis of further data sets are then discussed. |
| format | Article |
| id | doaj-art-91200415f919452ab77839f3812f0c8d |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-91200415f919452ab77839f3812f0c8d2025-01-02T22:57:22ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932017-07-01114119720210.3221/IGF-ESIS.41.27Measurement and analysis of fatigue crack deformation at the micro-scaleD. Nowell0 K.I. Dragnevski1S.J. O’Connor 2University of Oxford, UK University of Oxford, UK University of Oxford, UK This paper introduces the use of digital image correlation for the measurement of surface displacements in the neighbourhood of a crack tip, both at the macro- and micro- scale. Various methods of interpreting the measured data and producing a crack driving force are then discussed, including the use of the full CJP model. A reduced set of parameters are then proposed, corresponding to the three principal interaction forces between the plastic enclave and the surrounding elastic material. Our own results, and those of Vasco Olmo, previously reported in the literature are then reanalysed using this new framework, and excellent agreement between two independent experiments is obtained. Implications for the analysis of further data sets are then discussed.http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_27.pdfFatigueCrack Driving ForceDigital Image CorrelationCJP model |
| spellingShingle | D. Nowell K.I. Dragnevski S.J. O’Connor Measurement and analysis of fatigue crack deformation at the micro-scale Fracture and Structural Integrity Fatigue Crack Driving Force Digital Image Correlation CJP model |
| title | Measurement and analysis of fatigue crack deformation at the micro-scale |
| title_full | Measurement and analysis of fatigue crack deformation at the micro-scale |
| title_fullStr | Measurement and analysis of fatigue crack deformation at the micro-scale |
| title_full_unstemmed | Measurement and analysis of fatigue crack deformation at the micro-scale |
| title_short | Measurement and analysis of fatigue crack deformation at the micro-scale |
| title_sort | measurement and analysis of fatigue crack deformation at the micro scale |
| topic | Fatigue Crack Driving Force Digital Image Correlation CJP model |
| url | http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_27.pdf |
| work_keys_str_mv | AT dnowell measurementandanalysisoffatiguecrackdeformationatthemicroscale AT kidragnevski measurementandanalysisoffatiguecrackdeformationatthemicroscale AT sjoconnor measurementandanalysisoffatiguecrackdeformationatthemicroscale |