Simple model for directional distortional hardening in metal plasticity within thermodynamics

Feigenbaum, HP; Dafalias, YF

dc.contributor.author	Feigenbaum, HP	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T01:29:11Z
dc.date.available	2014-03-01T01:29:11Z
dc.date.issued	2008	en
dc.identifier.issn	0733-9399	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19149
dc.subject	Anisotropy	en
dc.subject	Elastoplasticity	en
dc.subject	Plasticity	en
dc.subject	Thermal factors	en
dc.subject	Yield	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Metals	en
dc.subject.other	Tensors	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Anisotropy	en
dc.subject.other	Constitutive modelling	en
dc.subject.other	Dissipation inequality	en
dc.subject.other	Elastoplasticity	en
dc.subject.other	Experimental data	en
dc.subject.other	Hardening rules	en
dc.subject.other	Internal variables	en
dc.subject.other	Isotropic hardenings	en
dc.subject.other	Mathematical formulations	en
dc.subject.other	Metal plasticity	en
dc.subject.other	Plasticity	en
dc.subject.other	Salient features	en
dc.subject.other	Simple modeling	en
dc.subject.other	Thermal factors	en
dc.subject.other	Yield	en
dc.subject.other	Yield surfaces	en
dc.subject.other	Hardening	en
dc.subject.other	anisotropy	en
dc.subject.other	elastoplasticity	en
dc.subject.other	experimental study	en
dc.subject.other	hardening	en
dc.subject.other	kinematics	en
dc.subject.other	loading	en
dc.subject.other	numerical model	en
dc.subject.other	thermodynamics	en
dc.title	Simple model for directional distortional hardening in metal plasticity within thermodynamics	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-9399(2008)134:9(730)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-9399(2008)134:9(730)	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Directional distortion, observed in many experiments on various types of metals, refers to the formation of a region of high curvature (sharpening) on the yield surface approximately in the direction of loading, and a region of low curvature (flattening) approximately in the opposite direction. Constitutive modeling of directional distortion was recently presented by the writers where an evolving fourth-order tensor-valued internal variable was introduced. In the current paper a much simpler mathematical formulation describing directional distortional hardening is presented without the use of a fourth-order tensor, in conjunction with kinematic and isotropic hardening. Two versions of the model in ascending level of complexity follow similar lines of development, which include derivation of all hardening rules on the basis of conditions sufficient to satisfy the thermodynamic dissipation inequality. As a tradeoff for its simplicity the present model does not fit experimental data as well as the model with the evolving fourth-order tensor, but it still captures the salient features of directional distortion in a rather satisfactory way. © 2008 ASCE.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Engineering Mechanics	en
dc.identifier.doi	10.1061/(ASCE)0733-9399(2008)134:9(730)	en
dc.identifier.isi	ISI:000258485100004	en
dc.identifier.volume	134	en
dc.identifier.issue	9	en
dc.identifier.spage	730	en
dc.identifier.epage	738	en