3D Analyses of crack propagation in torsion
The initiation and propagation of fatigue cracks during cyclic torsion loading was studied in a cast Al alloy (A357) with a relatively large (~500 ?m) grain size. 2D observations, revealed that multi site crack initiation occur on the {111} slip planes exhibiting the highest slip activity (iso-strai...
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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 |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1473 |
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| _version_ | 1841562865078632448 |
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| author | D. Shiozawa Serrano Munoz S. Dancette C. Verdu J. Lachambre J.-Y. Buffiere |
| author_facet | D. Shiozawa Serrano Munoz S. Dancette C. Verdu J. Lachambre J.-Y. Buffiere |
| author_sort | D. Shiozawa |
| collection | DOAJ |
| description | The initiation and propagation of fatigue cracks during cyclic torsion loading was studied in a cast
Al alloy (A357) with a relatively large (~500 ?m) grain size. 2D observations, revealed that multi site crack
initiation occur on the {111} slip planes exhibiting the highest slip activity (iso-strain Taylor analysis),
preferentially on planes nearly perpendicular to the sample axis. Within the first grain, the cracks have a
pronounced crystallographic propagation mode (mode II crack growth) and strongly interact with the grain
boundaries. In situ 3D monitoring of torsion fatigue tests using synchrotron X-ray tomography reveal that
propagation towards the interior of the samples occurs first along the sample periphery in mode II leading to
relatively shallow cracks which penetrate towards the sample center only after a large number of cycles is
reached .The values of mode I, II and III stress intensity factors have been calculated from finite element
simulation at the tip of the shallow mode II crack. Those values are used to analyse the bulk propagation of the
observed cracks. |
| format | Article |
| id | doaj-art-a4a3a9752eaf49afa46a159561359226 |
| 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-a4a3a9752eaf49afa46a1595613592262025-01-03T00:39:59ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932015-06-019333D Analyses of crack propagation in torsionD. ShiozawaSerrano MunozS. DancetteC. VerduJ. LachambreJ.-Y. BuffiereThe initiation and propagation of fatigue cracks during cyclic torsion loading was studied in a cast Al alloy (A357) with a relatively large (~500 ?m) grain size. 2D observations, revealed that multi site crack initiation occur on the {111} slip planes exhibiting the highest slip activity (iso-strain Taylor analysis), preferentially on planes nearly perpendicular to the sample axis. Within the first grain, the cracks have a pronounced crystallographic propagation mode (mode II crack growth) and strongly interact with the grain boundaries. In situ 3D monitoring of torsion fatigue tests using synchrotron X-ray tomography reveal that propagation towards the interior of the samples occurs first along the sample periphery in mode II leading to relatively shallow cracks which penetrate towards the sample center only after a large number of cycles is reached .The values of mode I, II and III stress intensity factors have been calculated from finite element simulation at the tip of the shallow mode II crack. Those values are used to analyse the bulk propagation of the observed cracks.https://www.fracturae.com/index.php/fis/article/view/14733D imaging |
| spellingShingle | D. Shiozawa Serrano Munoz S. Dancette C. Verdu J. Lachambre J.-Y. Buffiere 3D Analyses of crack propagation in torsion Fracture and Structural Integrity 3D imaging |
| title | 3D Analyses of crack propagation in torsion |
| title_full | 3D Analyses of crack propagation in torsion |
| title_fullStr | 3D Analyses of crack propagation in torsion |
| title_full_unstemmed | 3D Analyses of crack propagation in torsion |
| title_short | 3D Analyses of crack propagation in torsion |
| title_sort | 3d analyses of crack propagation in torsion |
| topic | 3D imaging |
| url | https://www.fracturae.com/index.php/fis/article/view/1473 |
| work_keys_str_mv | AT dshiozawa 3danalysesofcrackpropagationintorsion AT serranomunoz 3danalysesofcrackpropagationintorsion AT sdancette 3danalysesofcrackpropagationintorsion AT cverdu 3danalysesofcrackpropagationintorsion AT jlachambre 3danalysesofcrackpropagationintorsion AT jybuffiere 3danalysesofcrackpropagationintorsion |