Near tip strain evolution of a growing fatigue crack
Near tip full-field strains in a growing fatigue crack have been studied in situ using the Digital Image Correlation (DIC) technique in a compact tension specimen of stainless steel 316L under tension-tension cyclic loading. An error analysis of displacements and strains has been carried out, and th...
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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/1475 |
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| _version_ | 1841562828462358528 |
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| author | M.-L. Zhu Y.-W. Lu C. Lupton J. Tong |
| author_facet | M.-L. Zhu Y.-W. Lu C. Lupton J. Tong |
| author_sort | M.-L. Zhu |
| collection | DOAJ |
| description | Near tip full-field strains in a growing fatigue crack have been studied in situ using the Digital Image Correlation (DIC) technique in a compact tension specimen of stainless steel 316L under tension-tension cyclic loading. An error analysis of displacements and strains has been carried out, and the results show that the precision of displacements and strains in the wake of the crack is worse than that in front of the crack. A method for the determination of crack tip location is proposed for the DIC analysis. Strain ratchetting is observed ahead of the growing fatigue crack tip and found to be dependent on the distance to the crack tip; whilst normal strains appear to stabilise behind the crack tip. |
| format | Article |
| id | doaj-art-1f5bb437e1c54138b6f5506e8261ffc3 |
| 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-1f5bb437e1c54138b6f5506e8261ffc32025-01-03T00:39:46ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932015-06-01933Near tip strain evolution of a growing fatigue crackM.-L. ZhuY.-W. LuC. LuptonJ. TongNear tip full-field strains in a growing fatigue crack have been studied in situ using the Digital Image Correlation (DIC) technique in a compact tension specimen of stainless steel 316L under tension-tension cyclic loading. An error analysis of displacements and strains has been carried out, and the results show that the precision of displacements and strains in the wake of the crack is worse than that in front of the crack. A method for the determination of crack tip location is proposed for the DIC analysis. Strain ratchetting is observed ahead of the growing fatigue crack tip and found to be dependent on the distance to the crack tip; whilst normal strains appear to stabilise behind the crack tip.https://www.fracturae.com/index.php/fis/article/view/1475Crack tip |
| spellingShingle | M.-L. Zhu Y.-W. Lu C. Lupton J. Tong Near tip strain evolution of a growing fatigue crack Fracture and Structural Integrity Crack tip |
| title | Near tip strain evolution of a growing fatigue crack |
| title_full | Near tip strain evolution of a growing fatigue crack |
| title_fullStr | Near tip strain evolution of a growing fatigue crack |
| title_full_unstemmed | Near tip strain evolution of a growing fatigue crack |
| title_short | Near tip strain evolution of a growing fatigue crack |
| title_sort | near tip strain evolution of a growing fatigue crack |
| topic | Crack tip |
| url | https://www.fracturae.com/index.php/fis/article/view/1475 |
| work_keys_str_mv | AT mlzhu neartipstrainevolutionofagrowingfatiguecrack AT ywlu neartipstrainevolutionofagrowingfatiguecrack AT clupton neartipstrainevolutionofagrowingfatiguecrack AT jtong neartipstrainevolutionofagrowingfatiguecrack |