Characterisation of crack tip fields under non-uniform fatigue loading
The paper analyses previously reported work, which uses digital image correlation to measure fatigue crack closure. As well as determining crack opening loads, the information on crack shape may be used to estimate the stress intensity factor, as well as other parameters in more complex models of cr...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2013-04-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/201 |
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| author | D. Nowell M.E. Kartal P.F.P. de Matos |
| author_facet | D. Nowell M.E. Kartal P.F.P. de Matos |
| author_sort | D. Nowell |
| collection | DOAJ |
| description | The paper analyses previously reported work, which uses digital image correlation to measure fatigue crack closure. As well as determining crack opening loads, the information on crack shape may be used to estimate the stress intensity factor, as well as other parameters in more complex models of crack tip fields. A number of specimens were subjected to single overload cycles, which produced a significant retardation in crack growth rate. The method previously applied to the analysis of constant amplitude loading is here used to analyse the single overload case. The stress intensity factor history is found to be very different in the two cases and the consequences of this observation for analysis of fatigue crack propagation are discussed. |
| format | Article |
| id | doaj-art-6143cd89f938400a9837494888740dfe |
| institution | DOAJ |
| issn | 1971-8993 |
| language | English |
| publishDate | 2013-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-6143cd89f938400a9837494888740dfe2025-08-20T02:51:46ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932013-04-01725Characterisation of crack tip fields under non-uniform fatigue loadingD. NowellM.E. KartalP.F.P. de MatosThe paper analyses previously reported work, which uses digital image correlation to measure fatigue crack closure. As well as determining crack opening loads, the information on crack shape may be used to estimate the stress intensity factor, as well as other parameters in more complex models of crack tip fields. A number of specimens were subjected to single overload cycles, which produced a significant retardation in crack growth rate. The method previously applied to the analysis of constant amplitude loading is here used to analyse the single overload case. The stress intensity factor history is found to be very different in the two cases and the consequences of this observation for analysis of fatigue crack propagation are discussed.https://www.fracturae.com/index.php/fis/article/view/201Displacement measurement |
| spellingShingle | D. Nowell M.E. Kartal P.F.P. de Matos Characterisation of crack tip fields under non-uniform fatigue loading Fracture and Structural Integrity Displacement measurement |
| title | Characterisation of crack tip fields under non-uniform fatigue loading |
| title_full | Characterisation of crack tip fields under non-uniform fatigue loading |
| title_fullStr | Characterisation of crack tip fields under non-uniform fatigue loading |
| title_full_unstemmed | Characterisation of crack tip fields under non-uniform fatigue loading |
| title_short | Characterisation of crack tip fields under non-uniform fatigue loading |
| title_sort | characterisation of crack tip fields under non uniform fatigue loading |
| topic | Displacement measurement |
| url | https://www.fracturae.com/index.php/fis/article/view/201 |
| work_keys_str_mv | AT dnowell characterisationofcracktipfieldsundernonuniformfatigueloading AT mekartal characterisationofcracktipfieldsundernonuniformfatigueloading AT pfpdematos characterisationofcracktipfieldsundernonuniformfatigueloading |