Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/8666
Title: Ductile failure predictions using micromechanically-based computational models
Authors: Dæhli L.E.B.
Tekoğlu, Cihan
Morin D.
Børvik T.
Hopperstad O.S.
Keywords: Ductile fracture
Finite element analysis
Micromechanical modelling
Strain localization
Unit cell model
Void coalescence
Computation theory
Computational methods
Ductile fracture
Porous materials
Computational modelling
Ductile failures
Ductile solids
Failure criteria
Failures prediction
Finite element analyse
Micromechanical modelling
Strain localizations
Unit-cell model
Void coalescence
Finite element method
Issue Date: 2022
Publisher: Elsevier Ltd
Source: Dæhli, L. E. B., Tekoğlu, C., Morin, D., Børvik, T., & Hopperstad, O. S. (2022). Ductile failure predictions using micromechanically-based computational models. Journal of the Mechanics and Physics of Solids, 164, 104873.
Abstract: Three different micromechanically-based computational models for fracture in porous ductile solids are compared and assessed. Model A is a unit cell model of a porous ductile solid comprising a uniform periodic distribution of voids subjected to normal macroscopic loading. Models B and C, on the other hand, are unit-cell type models that represent an imperfection band governed by a doubly periodic array of voids separating two non-porous outer blocks. The outer blocks have a finite size in Model B and are semi-infinite in Model C. The non-porous material surrounding the voids, and the material of the outer blocks in Model B and Model C, are considered as an elasto-plastic isotropic material. Numerical simulations are performed for a wide range of macroscopic stress states. For each model, various criteria for determining the onset of ductile failure are evaluated to demonstrate their impact on the failure predictions. The results show that the failure loci strongly depend on the computational model and failure criterion employed. Thus, these three models cannot be used interchangeably – neither to investigate failure mechanisms nor to develop or calibrate fracture models – and an unambiguous failure criterion must be chosen. © 2022 The Author(s)
URI: https://doi.org/10.1016/j.jmps.2022.104873
https://hdl.handle.net/20.500.11851/8666
ISSN: 0022-5096
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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