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Multiaxial ratcheting with advanced kinematic and directional distortional hardening rules

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Show simple item record Feigenbaum, Heidi P. Dugdale, Joel Dafalias, Yannis F. Kourousis, Kyriakos I. Plesek, Jiri 2017-02-02T09:59:17Z 2017-02-02T09:59:17Z 2012
dc.description peer-reviewed en_US
dc.description.abstract Ratcheting is defined as the accumulation of plastic strains during cyclic plastic loading. Modeling this behavior is extremely difficult because any small error in plastic strain during a single cycle will add to become a large error after many cycles. As is typical with metals, most constitutive models use the associative flow rule which states that the plastic strain increment is in the direction normal to the yield surface. When the associative flow rule is used, it is important to have the shape of the yield surface modeled accurately because small deviations in shape may result in large deviations in the normal to the yield surface and thus the plastic strain increment in multi-axial loading. During cyclic plastic loading these deviations will accumulate and may result in large errors to predicted strains. This paper compares the bi-axial ratcheting simulations of two classes of plasticity models. The first class of models consists of the classical von Mises model with various kinematic hardening (KH) rules. The second class of models introduce directional distortional hardening (DDH) in addition to these various kinematic hardening rules. Directional distortion describes the formation of a region of high curvature on the yield surface approximately in the direction of loading and a region of flattened curvature approximately in the opposite direction. Results indicate that the addition of directional distortional hardening improves ratcheting predictions, particularly under biaxial stress controlled loading, over kinematic hardening alone. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation 290963 (SOMEF) en_US
dc.relation.ispartofseries International Journal of Solids and Structures;49 (22), pp. 3063-3076
dc.rights This is the author’s version of a work that was accepted for publication in International Journal of Solids and Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Solids and Structures, 2012, 49 (22), pp. 3063-3076, en_US
dc.subject plasticity en_US
dc.subject directional distortional hardening en_US
dc.subject thermodynamics en_US
dc.subject cyclic loading en_US
dc.subject ratcheting en_US
dc.title Multiaxial ratcheting with advanced kinematic and directional distortional hardening rules en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.ijsolstr.2012.06.006
dc.contributor.sponsor National Science Foundation en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid 1012066 en_US
dc.relation.projectid (FP7/2007-2013) en_US
dc.relation.projectid 290963 (SOMEF) en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1575907

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