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dc.contributor.authorAliguer Piferrer, Ignasi
dc.contributor.authorCarol, Ignacio
dc.contributor.authorSture, Stein
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2017-04-04T16:48:37Z
dc.date.available2018-05-01T00:30:39Z
dc.date.issued2017-04
dc.identifier.citationAliguer, I., Carol, I., Sture, S. Stress-driven integration strategies and m-AGC tangent operator for Perzyna viscoplasticity and viscoplastic relaxation: application to geomechanical interfaces. "International journal for numerical and analytical methods in geomechanics", Abril 2017, vol. 41, núm. 6, p. 918-939.
dc.identifier.issn0363-9061
dc.identifier.urihttp://hdl.handle.net/2117/103372
dc.descriptionThis is the peer reviewed version of the following article: [Aliguer, I., Carol, I., and Sture, S. (2017) Stress-driven integration strategies and m-AGC tangent operator for Perzyna viscoplasticity and viscoplastic relaxation: application to geomechanical interfaces. Int. J. Numer. Anal. Meth. Geomech., 41: 918–939. doi: 10.1002/nag.2654.], which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/nag.2654/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
dc.description.abstractThe paper proposes a stress-driven integration strategy for Perzyna-type viscoplastic constitutive models, which leads also to a convenient algorithm for viscoplastic relaxation schemes. A generalized trapezoidal rule for the strain increment, combined with a linearized form of the yield function and flow rules, leads to a plasticity-like compliance operator that can be explicitly inverted to give an algorithmic tangent stiffness tensor also denoted as the m-AGC tangent operator. This operator is combined with the stress-prescribed integration scheme, to obtain a natural error indicator that can be used as a convergence criterion of the intra-step iterations (in physical viscoplasticity), or to a variable time-step size in viscoplastic relaxation schemes based on a single linear calculation per time step. The proposed schemes have been implemented for an existing zero-thickness interface constitutive model. Some numerical application examples are presented to illustrate the advantages of the new schemes proposed.
dc.format.extent22 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia
dc.subject.lcshViscoplasticity--Mathematical models
dc.subject.otherViscoplasticity
dc.subject.otherViscoplastic relaxation
dc.subject.otherFinite element method
dc.subject.otherInterface elements
dc.titleStress-driven integration strategies and m-AGC tangent operator for Perzyna viscoplasticity and viscoplastic relaxation: application to geomechanical interfaces
dc.typeArticle
dc.subject.lemacViscoplasticitat
dc.contributor.groupUniversitat Politècnica de Catalunya. MECMAT - Mecànica de Materials
dc.identifier.doi10.1002/nag.2654
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1002/nag.2654/abstract
dc.rights.accessOpen Access
local.identifier.drac19728191
dc.description.versionPostprint (author's final draft)
local.citation.authorAliguer, I.; Carol, I.; Sture, S.
local.citation.publicationNameInternational journal for numerical and analytical methods in geomechanics
local.citation.volume41
local.citation.number6
local.citation.startingPage918
local.citation.endingPage939


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