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dc.contributor.authorCervera Ruiz, Miguel
dc.contributor.authorWu, Jian-Ying
dc.contributor.authorKim, Sungchul
dc.contributor.authorChiumenti, Michele
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2022-07-26T13:54:45Z
dc.date.available2023-04-07T00:28:49Z
dc.date.issued2022-04
dc.identifier.citationCervera, M. [et al.]. On the mechanics of strain localization in plasticity: isotropic and orthotropic, elasto- and rigid-plastic, associated and non-associated models. "Acta mechanica", Abril 2022, vol. 233, núm. 4, p. 1513-1542.
dc.identifier.issn0001-5970
dc.identifier.otherhttps://www.researchgate.net/publication/358759977_On_the_mechanics_of_strain_localization_in_plasticity_Isotropic_and_orthotropic_elasto-and_rigid-plastic_associated_and_non-associated_models
dc.identifier.urihttp://hdl.handle.net/2117/371180
dc.descriptionThe final publication is available at Springer via http://dx.doi.org/10.1007/s00707-022-03184-9
dc.description.abstractAs strain localization is usually prognostics of localized failure in solids and structures, prediction of its occurrence and quantification of its adverse effects are of both theoretical and practical significance. Regarding plastic solids, onset of strain localization was presumed to be coincident with strain bifurcation, and the discontinuous bifurcation analysis was usually adopted to determine the discontinuity orientation though it does not apply to rigid-plastic solids. However, recent studies indicate that strain bifurcation and localization correspond to distinct stages of localized failure and should be dealt with separately. In this work, the mechanics of strain localization is addressed for perfect and softening plasticity in the most general context. Both isotropic and orthotropic, elasto- and rigid-plastic solids with associated and non-associated flow rules are analytically considered and numerically validated, extending our previous work on softening plasticity with associated evolution laws. In addition to Maxwell’s kinematics and continuity of the traction rate for strain bifurcation, a novel necessary condition, i.e., the stress rate objectivity (independent from the discontinuity bandwidth), and the resulting kinematic and static constraints, are derived for the occurrence of strain localization. In particular, the localization angles of the discontinuity band (surface) depend only on the specific stress state and the plastic flow tensor, irrespective from the material elastic constants and from the plastic yield function. Moreover, it is found that a transition stage generally exists in the case of plane strain during which the orientation of plastic flow rotates progressively such that strain localization may occur. Back-to-back numerical predictions of some benchmark problems, involving both perfect and softening plasticity, also justify the analytical results.
dc.description.sponsorshipFinancial support from the Spanish Ministry of Economy and Competitiveness through the Severo Ochoa Programme for Centres of Excellence in R&D (CEX2018- 000797-S) as well as the PriMuS project (Printing pattern based and MultiScale enhanced performance analysis of advanced Additive Manufacturing components, PID2020-115575RB-I00) is greatly acknowledged This work is also supported by National Natural Science Foundation of China (52125801; 51878294), NationalKey Laboratory of Shockwave and Denotation Physics (JCKYS2020212016) andGuangdong ProvincialKey Laboratory of Modern Civil Engineering Technology (2021B1212040003) to J.Y. Wu.
dc.format.extent30 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits
dc.subject.lcshPlasticity--Mathematical models
dc.subject.otherLocalized failure
dc.subject.otherPlasticity
dc.subject.otherStrain localization
dc.subject.otherStrain bifurcation
dc.subject.otherDiscontinuities
dc.titleOn the mechanics of strain localization in plasticity: isotropic and orthotropic, elasto- and rigid-plastic, associated and non-associated models
dc.typeArticle
dc.subject.lemacPlasticitat -- Mètodes numèrics
dc.contributor.groupUniversitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria
dc.identifier.doi10.1007/s00707-022-03184-9
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s00707-022-03184-9
dc.rights.accessOpen Access
local.identifier.drac33093659
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-115575RB-I00/ES/ANALISIS DE RENDIMIENTO MEJORADO BASADO EN PATRONES DE IMPRESION Y MULTIESCALA DE COMPONENTES DE FABRICACION ADITIVA AVANZADA/
local.citation.authorCervera, M.; Wu, J.; Kim, S.; Chiumenti, M.
local.citation.publicationNameActa mechanica
local.citation.volume233
local.citation.number4
local.citation.startingPage1513
local.citation.endingPage1542


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