Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields
In this work it is proposed a methodology for the evaluation of plasticity-induced crack shielding from the analysis of the crack tip displacements fields measured by digital image correlation. This methodology is based on the evaluation of the stress intensity factors determined from the displace...
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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 |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_24.pdf |
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| _version_ | 1846092602272645120 |
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| author | J.M. Vasco-Olmo F.A. Díaz |
| author_facet | J.M. Vasco-Olmo F.A. Díaz |
| author_sort | J.M. Vasco-Olmo |
| collection | DOAJ |
| description | In this work it is proposed a methodology for the evaluation of plasticity-induced crack shielding
from the analysis of the crack tip displacements fields measured by digital image correlation. This methodology
is based on the evaluation of the stress intensity factors determined from the displacements fields measured at
the vicinity of the tip of a growing fatigue crack. For the characterisation of the crack tip displacements field,
CJP model has been implemented. This model considers the shielding effects due to plasticity generated during
fatigue crack growth. For the purpose of the current work, several fatigue experiments at different R-ratios have
been conducted on Al2024-T3 compact tension specimens. In addition, compliance based methods have been
adopted to perform a comparison of the results with those obtained by DIC. Results show a good level of
agreement, illustrating the enormous potential of DIC technique for the study of fracture mechanics problems. |
| format | Article |
| id | doaj-art-cf7c10aac5b849f19e659aa9a11c2c79 |
| 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-cf7c10aac5b849f19e659aa9a11c2c792025-01-02T20:54:01ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932015-07-0193319119810.3221/IGF-ESIS.33.24Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fieldsJ.M. Vasco-Olmo0F.A. Díaz1University of Jaén,SpainUniversity of Jaén,SpainIn this work it is proposed a methodology for the evaluation of plasticity-induced crack shielding from the analysis of the crack tip displacements fields measured by digital image correlation. This methodology is based on the evaluation of the stress intensity factors determined from the displacements fields measured at the vicinity of the tip of a growing fatigue crack. For the characterisation of the crack tip displacements field, CJP model has been implemented. This model considers the shielding effects due to plasticity generated during fatigue crack growth. For the purpose of the current work, several fatigue experiments at different R-ratios have been conducted on Al2024-T3 compact tension specimens. In addition, compliance based methods have been adopted to perform a comparison of the results with those obtained by DIC. Results show a good level of agreement, illustrating the enormous potential of DIC technique for the study of fracture mechanics problems.http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_24.pdfPlasticity-induced crack shieldingFatigueStress intensity factor;Digital image correlation |
| spellingShingle | J.M. Vasco-Olmo F.A. Díaz Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields Fracture and Structural Integrity Plasticity-induced crack shielding Fatigue Stress intensity factor; Digital image correlation |
| title | Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields |
| title_full | Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields |
| title_fullStr | Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields |
| title_full_unstemmed | Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields |
| title_short | Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields |
| title_sort | experimental evaluation of plasticity induced crack shielding from crack tip displacements fields |
| topic | Plasticity-induced crack shielding Fatigue Stress intensity factor; Digital image correlation |
| url | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_24.pdf |
| work_keys_str_mv | AT jmvascoolmo experimentalevaluationofplasticityinducedcrackshieldingfromcracktipdisplacementsfields AT fadiaz experimentalevaluationofplasticityinducedcrackshieldingfromcracktipdisplacementsfields |