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...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2015-07-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_9.pdf |
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| _version_ | 1841562896350314496 |
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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-0baf708eedaa48e1bfdb1c503d06c5ee |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2015-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-0baf708eedaa48e1bfdb1c503d06c5ee2025-01-03T00:39:21ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932015-07-01933677210.3221/IGF-ESIS.33.09Near tip strain evolution of a growing fatigue crackM.-L. Zhu0Y.-W. Lu1C. Lupton2J. Tong3University of Portsmouth, UKUniversity of Portsmouth, UKUniversity of Portsmouth, UKUniversity of Portsmouth, UKNear 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.http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_9.pdfDICCrack tipError analysisFatigue crack growthStrain ratchetting |
| spellingShingle | M.-L. Zhu Y.-W. Lu C. Lupton J. Tong Near tip strain evolution of a growing fatigue crack Fracture and Structural Integrity DIC Crack tip Error analysis Fatigue crack growth Strain ratchetting |
| 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 | DIC Crack tip Error analysis Fatigue crack growth Strain ratchetting |
| url | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_9.pdf |
| work_keys_str_mv | AT mlzhu neartipstrainevolutionofagrowingfatiguecrack AT ywlu neartipstrainevolutionofagrowingfatiguecrack AT clupton neartipstrainevolutionofagrowingfatiguecrack AT jtong neartipstrainevolutionofagrowingfatiguecrack |