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dc.contributor.authorVasco-Olmo, JM
dc.contributor.authorDiaz, FA
dc.contributor.authorJames, MN
dc.contributor.authorChristopher, CJ
dc.contributor.authorPatterson, EA
dc.date.accessioned2018-01-09T10:09:49Z
dc.date.available2018-01-09T10:09:49Z
dc.date.issued2017
dc.identifier.issn1971-8993
dc.identifier.issn1971-8993
dc.identifier.urihttp://hdl.handle.net/10026.1/10507
dc.description.abstract

The current work presents a novel methodology for the experimental quantification of the crack tip plastic zone during fatigue crack growth. This methodology is based on the application of yield criteria to estimate the area and the shape of the plastic zone at the crack tip. The implementation of the proposed methodology requires the use of strain maps calculated from the differentiation of the displacement fields obtained by digital image correlation (DIC). Stress maps can subsequently be inferred from both von Mises and Tresca yield criteria. Fatigue tests and associated measurements of plastic zone size and shape were conducted on a compact-tension specimen made from commercially pure titanium at R ratio of 0.6. In addition, the ability to predict the shape and size of the experimentally observed crack tip plastic zone has been explored using three different analytical elastic crack tip models [Westergaard, Williams and Christopher-James-Patterson (CJP)]. This analysis indicated that the CJP model provided the most accurate prediction of the plastic zone and shape.

dc.format.extent166-174
dc.language.isoen
dc.publisherGruppo Italiano Frattura
dc.subjectCrack tip plastic zone
dc.subjectFatigue
dc.subjectCrack tip fields
dc.subjectCrack shielding
dc.subjectStress intensity factor
dc.subjectDIC
dc.titleExperimental methodology for the quantification of crack tip plastic zone and shape from the analysis of displacement fields
dc.typejournal-article
dc.typeArticle
plymouth.issue41
plymouth.volume11
plymouth.publication-statusPublished online
plymouth.journalFrattura ed Integrità Strutturale
dc.identifier.doi10.3221/igf-esis.41.23
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.identifier.eissn1971-8993
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.3221/igf-esis.41.23
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review


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