Finite element analysis of discrete circular dislocations

Baxevanakis, KP; Giannakopoulos, AE

dc.contributor.author	Baxevanakis, KP	en
dc.contributor.author	Giannakopoulos, AE	en
dc.date.accessioned	2014-03-01T01:33:29Z
dc.date.available	2014-03-01T01:33:29Z
dc.date.issued	2010	en
dc.identifier.issn	1526-1492	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20445
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77956118643&partnerID=40&md5=0fe0cacbe3ac743785ccf28823c01364	en
dc.subject	Anisotropic elasticity	en
dc.subject	Dislocations	en
dc.subject	Finite elements	en
dc.subject	Nano-mechanics	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Mathematics, Interdisciplinary Applications	en
dc.subject.other	Analytical solutions	en
dc.subject.other	Anisotropic crystals	en
dc.subject.other	Anisotropic elasticity	en
dc.subject.other	Axisymmetric finite elements	en
dc.subject.other	Bi-material interfaces	en
dc.subject.other	Dislocation loop	en
dc.subject.other	Dislocations	en
dc.subject.other	Finite Element	en
dc.subject.other	Finite element analysis	en
dc.subject.other	Free surfaces	en
dc.subject.other	Full-field	en
dc.subject.other	Inhomogeneities	en
dc.subject.other	Integral representation	en
dc.subject.other	Interstitial particles	en
dc.subject.other	Micro voids	en
dc.subject.other	Peach-Koehler forces	en
dc.subject.other	Plastic yield	en
dc.subject.other	Quantitative result	en
dc.subject.other	Size effects	en
dc.subject.other	Volterra	en
dc.subject.other	Yield strength	en
dc.subject.other	Anisotropy	en
dc.subject.other	Crystallography	en
dc.subject.other	Edge dislocations	en
dc.subject.other	Elasticity	en
dc.subject.other	Grain boundaries	en
dc.subject.other	Mechanics	en
dc.subject.other	Yield stress	en
dc.subject.other	Finite element method	en
dc.title	Finite element analysis of discrete circular dislocations	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The present work gives a systematic and rigorous implementation of (edge type) circular Volterra dislocation loops in ordinary axisymmetric finite elements using the thermal analogue and the integral representation of dislocations through stresses. The accuracy of the proposed method is studied in problems where analytical solutions exist. The full fields are given for loop dislocations in isotropic and anisotropic crystals and the Peach-Koehler forces are calculated for loops approaching free surfaces and bimaterial interfaces. The results are expected to be very important in the analysis of plastic yield strength, giving quantitative results regarding the influence of grain boundaries, interstitial particles, microvoids, thin film constraints and nano-indentation phenomena. The interaction of few dis-locations with various inhomogeneities gives rise to size effects in the yield strength which are of great importance in nano-mechanics. Copyright © 2010 Tech Science Press.	en
heal.publisher	TECH SCIENCE PRESS	en
heal.journalName	CMES - Computer Modeling in Engineering and Sciences	en
dc.identifier.isi	ISI:000281311800004	en
dc.identifier.volume	60	en
dc.identifier.issue	2	en
dc.identifier.spage	181	en
dc.identifier.epage	197	en