Experimental evaluation of plastic wake on growing fatigue cracks from the analysis of residual displacement fields
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| Main Authors: | , , , , |
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| Format: | Recurso digital |
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Zenodo
2022
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| _version_ | 1866901217174618112 |
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| author | Vasco Olmo, Jose Manuel Diaz Garrido, Francisco Alberto Camacho Reyes, Alonso James, Neil Antunes, Fernando |
| author_facet | Vasco Olmo, Jose Manuel Diaz Garrido, Francisco Alberto Camacho Reyes, Alonso James, Neil Antunes, Fernando |
| contents | <p>A growing fatigue crack gives rise to a plastically deformed wake of material that envelops the crack. In this work, the plastic wake extent during fatigue crack growth is experimentally quantified by analyzing the crack tip displacement fields measured with digital image correlation. A novel technique based on use of a yield criterion is proposed that uses the undamaged state of the specimen as the reference state in the image processing. The plastic wake was identified by differentiation of the residual displacement fields obtained with a near-zero load level to avoid any rigid body motion. The plastic wake extent was then found by assuming that the boundary between the elastic and plastic regions would occur when the equivalent stress was higher than the yield stress of the material. The results presented can contribute to a better understanding of the mechanisms driving fatigue crack propagation.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_1111_ffe_13681 |
| institution | Zenodo |
| language | |
| publishDate | 2022 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Experimental evaluation of plastic wake on growing fatigue cracks from the analysis of residual displacement fields Vasco Olmo, Jose Manuel Diaz Garrido, Francisco Alberto Camacho Reyes, Alonso James, Neil Antunes, Fernando digital image correlation fatigue crack growth plastic wake residual displacement fields yield criterion <p>A growing fatigue crack gives rise to a plastically deformed wake of material that envelops the crack. In this work, the plastic wake extent during fatigue crack growth is experimentally quantified by analyzing the crack tip displacement fields measured with digital image correlation. A novel technique based on use of a yield criterion is proposed that uses the undamaged state of the specimen as the reference state in the image processing. The plastic wake was identified by differentiation of the residual displacement fields obtained with a near-zero load level to avoid any rigid body motion. The plastic wake extent was then found by assuming that the boundary between the elastic and plastic regions would occur when the equivalent stress was higher than the yield stress of the material. The results presented can contribute to a better understanding of the mechanisms driving fatigue crack propagation.</p> |
| title | Experimental evaluation of plastic wake on growing fatigue cracks from the analysis of residual displacement fields |
| topic | digital image correlation fatigue crack growth plastic wake residual displacement fields yield criterion |
| url | https://doi.org/10.1111/ffe.13681 |