Multiaxial ratcheting with advanced kinematic and directional distortional hardening rules

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dc.contributor.author Feigenbaum, HP en
dc.contributor.author Dugdale, J en
dc.contributor.author Dafalias, YF en
dc.contributor.author Kourousis, KI en
dc.contributor.author Plesek, J en
dc.date.accessioned 2014-03-01T02:11:28Z
dc.date.available 2014-03-01T02:11:28Z
dc.date.issued 2012 en
dc.identifier.issn 00207683 en
dc.identifier.uri http://hdl.handle.net/123456789/29912
dc.subject Cyclic loading en
dc.subject Directional distortional hardening en
dc.subject Plasticity en
dc.subject Ratcheting en
dc.subject Thermodynamics en
dc.subject.other Biaxial stress en
dc.subject.other Cyclic loadings en
dc.subject.other Flow rules en
dc.subject.other Hardening rules en
dc.subject.other Kinematic hardening en
dc.subject.other Kinematic hardening rule en
dc.subject.other Large deviations en
dc.subject.other Multi-axial loadings en
dc.subject.other Multiaxial ratcheting en
dc.subject.other Plastic loading en
dc.subject.other Plastic strain increment en
dc.subject.other Plasticity model en
dc.subject.other Ratcheting en
dc.subject.other Single cycle en
dc.subject.other Von Mises en
dc.subject.other Yield surface en
dc.subject.other Hardening en
dc.subject.other Kinematics en
dc.subject.other Plastic deformation en
dc.subject.other Plasticity en
dc.subject.other Stress analysis en
dc.subject.other Thermodynamics en
dc.subject.other Loading en
dc.title Multiaxial ratcheting with advanced kinematic and directional distortional hardening rules en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.ijsolstr.2012.06.006 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.ijsolstr.2012.06.006 en
heal.publicationDate 2012 en
heal.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. © 2012 Elsevier Ltd. All rights reserved. en
heal.journalName International Journal of Solids and Structures en
dc.identifier.doi 10.1016/j.ijsolstr.2012.06.006 en
dc.identifier.volume 49 en
dc.identifier.issue 22 en
dc.identifier.spage 3063 en
dc.identifier.epage 3076 en

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