Multiplicative AF kinematic hardening in plasticity

Dafalias, YF; Kourousis, KI; Saridis, GJ

dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Kourousis, KI	en
dc.contributor.author	Saridis, GJ	en
dc.date.accessioned	2014-03-01T01:28:48Z
dc.date.available	2014-03-01T01:28:48Z
dc.date.issued	2008	en
dc.identifier.issn	0020-7683	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18983
dc.subject	Constitutive laws	en
dc.subject	Cyclic plasticity	en
dc.subject	Kinematic hardening	en
dc.subject	Ratcheting	en
dc.subject.classification	Mechanics	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Hardening	en
dc.subject.other	Mathematical models	en
dc.subject.other	Plasticity	en
dc.subject.other	Stainless steel	en
dc.subject.other	Armstrong and Frederick (AF) kinematic hardening rule	en
dc.subject.other	Constitutive laws	en
dc.subject.other	Cyclic plasticity	en
dc.subject.other	Kinematic hardening	en
dc.subject.other	Ratcheting	en
dc.subject.other	Kinematics	en
dc.title	Multiplicative AF kinematic hardening in plasticity	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijsolstr.2008.01.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijsolstr.2008.01.001	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The basic innovation proposed in this work is to consider one of the two coefficients of the Armstrong and Frederick (AF) evolution equation for the back stress, function of another dimensionless second order internal variable evolving also according to an AF equation in what can be called a multiplicative AF kinematic hardening rule. Introducing the foregoing modification into some of the components of the back stress additive decomposition model proposed by Chaboche et al. [Chaboche, J.L., Dang-Van, K., Cordier, G., 1979. Modelization of strain memory effect on the cyclic hardening of 316 stainless steel. In: Transactions of the 5th International Conference on Structural Mechanics in Reactor Technology, Berlin, no. Div L in 11/3], one obtains a refined model with improved performance in partial unloading/reloading and ratcheting. In many respects the multiplicative AF kinematic hardening scheme plays a role equivalent to that of the back stress with a threshold scheme introduced by Chaboche [Chaboche, J.L., 1991. On some modifications of kinematic hardening to improve the description of ratcheting effects. Int. J. Plasticity 7, 661-678] to improve ratcheting simulations. The basis equations are presented for both uniaxial and multiaxial stress spaces and the calibration of the model constants is addressed in detail. Numerical applications are executed for uniaxial cyclic loading only, and indicate that the proposed refinement can perform quite well in simulating uniaxial experimental data, including ratcheting, while the potential to simulate successfully multiaxial loading data is an issue to be addressed in the future. (c) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Solids and Structures	en
dc.identifier.doi	10.1016/j.ijsolstr.2008.01.001	en
dc.identifier.isi	ISI:000255323900006	en
dc.identifier.volume	45	en
dc.identifier.issue	10	en
dc.identifier.spage	2861	en
dc.identifier.epage	2880	en