Biaxial ratchetting with novel variations of kinematic hardening

Dafalias, YF; Feigenbaum, HP

dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Feigenbaum, HP	en
dc.date.accessioned	2014-03-01T01:35:21Z
dc.date.available	2014-03-01T01:35:21Z
dc.date.issued	2011	en
dc.identifier.issn	0749-6419	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21013
dc.subject	Biaxial ratchetting	en
dc.subject	Cyclic plasticity	en
dc.subject	Kinematic hardening	en
dc.subject	Multicomponent	en
dc.subject	Multiplicative	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Mechanics	en
dc.subject.other	Cyclic plasticity	en
dc.subject.other	Kinematic hardening	en
dc.subject.other	Multicomponents	en
dc.subject.other	Multiplicative	en
dc.subject.other	Ratchetting	en
dc.subject.other	Carbon steel	en
dc.subject.other	Computer simulation	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Kinematics	en
dc.subject.other	Hardening	en
dc.title	Biaxial ratchetting with novel variations of kinematic hardening	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijplas.2010.06.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijplas.2010.06.002	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Kinematic hardening and the associated concept of back-stress and its evolution are fundamental constitutive ingredients of classical plasticity theory used to simulate the inelastic material response under stress reversals. Cyclic plasticity addresses such response under a sequence of repeated stress reversals, which results in plastic strain accumulation, called ratchetting. Biaxial ratchetting occurs whenever the material is loaded in two directions although typically the cyclic loading is only in one direction. The realistic description of the material response during cyclic loading depends strongly on the kind of kinematic hardening used. This paper investigates the performance of some existing and novel kinematic hardening rules in the prediction of ratchetting. The multiplicative AF model by Dafalias et al. (2008a,b), which was originally applied to the simulation of uniaxial ratchetting, will be used here to simulate also biaxial ratchetting and will be compared with a model using the concept of a hardening stress threshold. The suggestion of Delobelle et al. (1995) to combine the Armstrong/Frederick and Burlet and Cailletaud (1986) kinematic hardening rules is incorporated in the aforementioned model and used to obtain improved simulations of biaxial ratchetting. After showing a deficiency of the foregoing suggestion which results in the possibility for the back-stress to cross it's bounding surface and induce a negative plastic modulus, a variation is proposed void of the foregoing deficiency, which is successfully tested in the simulation of multiple biaxial ratchetting experimental results on carbon steel 1026. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Plasticity	en
dc.identifier.doi	10.1016/j.ijplas.2010.06.002	en
dc.identifier.isi	ISI:000288980700001	en
dc.identifier.volume	27	en
dc.identifier.issue	4	en
dc.identifier.spage	479	en
dc.identifier.epage	491	en