MICROSTRUCTURE IN KINEMATIC-HARDENING PLASTICITY

VARDOULAKIS, I; FRANTZISKONIS, G

dc.contributor.author	VARDOULAKIS, I	en
dc.contributor.author	FRANTZISKONIS, G	en
dc.date.accessioned	2014-03-01T01:41:28Z
dc.date.available	2014-03-01T01:41:28Z
dc.date.issued	1992	en
dc.identifier.issn	0997-7538	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23498
dc.subject.classification	Mechanics	en
dc.subject.other	PLANE-STRAIN	en
dc.subject.other	CONTINUUM	en
dc.title	MICROSTRUCTURE IN KINEMATIC-HARDENING PLASTICITY	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1992	en
heal.abstract	A gradient regularization of the classical kinematic-hardening plasticity is presented. The underlying continuum model is formally related to Mindlin's elasticity theory with micro-structure. The evolution law for the back stress is identical to Mindlin's higher order equilibrium equation. For consistency reasons the flow rule of classical plasticity is modified by incorporating the Laplacian of the plastic multiplier. The variational formulation of the problem with appropriate boundary conditions is given and an expression for the dissipated energy is established. Shear-band analysis shows that the theory provides the band thickness, and regularizes the governing equations. Micro-structure introduces a singular perturbation to the classical surface instability analysis, and the internal length l is the perturbation parameter. In addition, micro-structure effects tend to reduce the wavelength at onset of surface instability.	en
heal.publisher	GAUTHIER-VILLARS	en
heal.journalName	EUROPEAN JOURNAL OF MECHANICS A-SOLIDS	en
dc.identifier.isi	ISI:A1992JH03900003	en
dc.identifier.volume	11	en
dc.identifier.issue	4	en
dc.identifier.spage	467	en
dc.identifier.epage	486	en