Identification of the plastic zone using digital image correlation
In this paper Digital Image Correlation (DIC) is used to study the evolution of the plastic zone close to a crack tip. A modified CT-specimen was used in order to fulfill the plane stress condition. The strain field around the crack tip was measured using two cameras and stereo DIC, so that out-of...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_66.pdf |
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| Summary: | In this paper Digital Image Correlation (DIC) is used to study the evolution of the plastic zone
close to a crack tip. A modified CT-specimen was used in order to fulfill the plane stress condition. The strain
field around the crack tip was measured using two cameras and stereo DIC, so that out-of-plane movements are
taken into account. Then, the Virtual Fields Method was used to identify the plastic zone, looking at the parts of
the specimen which deviates from the linear elastic behavior. With such approach, it was possible to individuate
the onset of plasticity close to the crack tip and follow its evolution. A comparison with FEM results is also
provided. |
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| ISSN: | 1971-8993 1971-8993 |