On the interplay between material flaws and dynamic necking

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dc.contributor.author Vaz-Romero, Álvaro
dc.contributor.author Rodríguez-Martínez, José A.
dc.date.accessioned 2019-12-02T11:37:58Z
dc.date.available 2019-12-02T11:37:58Z
dc.date.issued 2016-03-01
dc.identifier.bibliographicCitation Mechanics Research Communications, vol. 72, March 2016, pp. 53-58.
dc.identifier.issn 0093-6413
dc.identifier.uri http://hdl.handle.net/10016/29278
dc.description.abstract In this paper we investigate the interplay between material defects and flow localization in elastoplastic bars subjected to dynamic tension. For that task, we have developed a 10 finite difference scheme within a large deformation framework in which the material is modelled using rate-dependent J(2) plasticity. A perturbation of the initial yield stress is introduced in each node of the finite difference mesh to model localized material flaws. Numerical computations are carried out within a wide spectrum of strain rates ranging from 500 s(-1) to 2500 s(-1). On the one hand, our calculations reveal the effect of the material defects in the necking process. On the other hand, our results show that the necking inception, instead of being a random type process, is the deterministic result of the interplay between the mechanical behaviour of the material and the boundary conditions. This conclusion agrees with the experimental evidence reported by Rittel et al. [1] and Rotbaum et al. [2].
dc.description.sponsorship The authors are indebted to the Ministerio de Economía y Competitividad de España (Project DPI2014-57989-P) for the financial support received which allowed conducting this work.
dc.format.extent 5
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2016 Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Dynamic stretching
dc.subject.other Numerical simulations
dc.subject.other Material defects
dc.subject.other Flow localization
dc.title On the interplay between material flaws and dynamic necking
dc.type article
dc.description.status Publicado
dc.subject.eciencia Ingeniería Mecánica
dc.identifier.doi https://doi.org/10.1016/j.mechrescom.2016.01.003
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. DPI2014-57989-P
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 53
dc.identifier.publicationlastpage 58
dc.identifier.publicationtitle Mechanics Research Communications
dc.identifier.publicationvolume 72
dc.identifier.uxxi AR/0000017906
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