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dc.contributor.authorMathew, TV
dc.contributor.authorNatarajan, S
dc.contributor.authorMartínez-Pañeda, Emilio
dc.date.accessioned2018-11-08T00:30:59Z
dc.date.available2018-11-08T00:30:59Z
dc.date.issued2018-11-15
dc.identifier.issn0263-8223
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/284754
dc.description.abstractWe develop a strain gradient plasticity formulation for composite materials with spatially varying volume fractions to characterize size effects in functionally graded materials (FGMs). The model is grounded on the mechanism-based strain gradient plasticity theory and effective properties are determined by means of a linear homogenization scheme. Several paradigmatic boundary value problems are numerically investigated to gain insight into the strengthening effects associated with plastic strain gradients and geometrically necessary dislocations (GNDs). The analysis of bending in micro-size functionally graded foils shows a notably stiffer response with diminishing thickness. Micro-hardness measurements from indentation reveal a significant increase with decreasing indenter size. And large dislocation densities in the vicinity of the crack substantially elevate stresses in cracked FGM components. We comprehensively assess the influence of the length scale parameter and material gradation profile to accurately characterize the micro-scale response and identify regimes of GNDs relevance in FGMs.
dc.description.sponsorshipMinistry of Economy and Competitiveness of Spain through Grant MAT2014-58738-C3 People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007–2013) under REA Grant agreement n 609405 (COFUNDPostdocDTU)
dc.publisherElsevier BV
dc.titleSize effects in elastic-plastic functionally graded materials
dc.typeArticle
prism.endingPage51
prism.publicationDate2018
prism.publicationNameComposite Structures
prism.startingPage43
prism.volume204
dc.identifier.doi10.17863/CAM.32126
dcterms.dateAccepted2018-07-16
rioxxterms.versionofrecord10.1016/j.compstruct.2018.07.048
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-11-15
dc.contributor.orcidNatarajan, S [0000-0002-0409-0096]
dc.contributor.orcidMartínez-Pañeda, Emilio [0000-0002-1562-097X]
dc.identifier.eissn1879-1085
dc.publisher.urlhttp://dx.doi.org/10.1016/j.compstruct.2018.07.048
rioxxterms.typeJournal Article/Review
cam.issuedOnline2018-07-21
rioxxterms.freetoread.startdate2019-07-21


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