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Plastic flow anisotropy drives shear fracture
Fracture of initially crack-free bodies often occurs due to plastic instabilities known as shear bands. Previous computer simulations advanced a myriad of mechanisms to rationalize shear banding. However, they were restricted to planar geometries. We investigate the relevance of anisotropic plastici...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6363917/ https://www.ncbi.nlm.nih.gov/pubmed/30723250 http://dx.doi.org/10.1038/s41598-018-38437-y |
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author | Benzerga, A. Amine Thomas, Nithin Herrington, Joshua S. |
author_facet | Benzerga, A. Amine Thomas, Nithin Herrington, Joshua S. |
author_sort | Benzerga, A. Amine |
collection | PubMed |
description | Fracture of initially crack-free bodies often occurs due to plastic instabilities known as shear bands. Previous computer simulations advanced a myriad of mechanisms to rationalize shear banding. However, they were restricted to planar geometries. We investigate the relevance of anisotropic plasticity by picking an axisymmetric tensile test rig, in which shear localization is rarely observed. The three-dimensional finite-element simulations of shear banding in this type of specimens are the first of their kind. The micromechanical modeling covers a range of competing mechanisms believed to be responsible for such failure. We show that anisotropic plasticity can effectively trigger shear bands thereby causing failure of ductile solids. Our results enable shear fracture to be rationalized in ductile rocks and mitigated against in designing advanced materials. |
format | Online Article Text |
id | pubmed-6363917 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63639172019-02-08 Plastic flow anisotropy drives shear fracture Benzerga, A. Amine Thomas, Nithin Herrington, Joshua S. Sci Rep Article Fracture of initially crack-free bodies often occurs due to plastic instabilities known as shear bands. Previous computer simulations advanced a myriad of mechanisms to rationalize shear banding. However, they were restricted to planar geometries. We investigate the relevance of anisotropic plasticity by picking an axisymmetric tensile test rig, in which shear localization is rarely observed. The three-dimensional finite-element simulations of shear banding in this type of specimens are the first of their kind. The micromechanical modeling covers a range of competing mechanisms believed to be responsible for such failure. We show that anisotropic plasticity can effectively trigger shear bands thereby causing failure of ductile solids. Our results enable shear fracture to be rationalized in ductile rocks and mitigated against in designing advanced materials. Nature Publishing Group UK 2019-02-05 /pmc/articles/PMC6363917/ /pubmed/30723250 http://dx.doi.org/10.1038/s41598-018-38437-y Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Benzerga, A. Amine Thomas, Nithin Herrington, Joshua S. Plastic flow anisotropy drives shear fracture |
title | Plastic flow anisotropy drives shear fracture |
title_full | Plastic flow anisotropy drives shear fracture |
title_fullStr | Plastic flow anisotropy drives shear fracture |
title_full_unstemmed | Plastic flow anisotropy drives shear fracture |
title_short | Plastic flow anisotropy drives shear fracture |
title_sort | plastic flow anisotropy drives shear fracture |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6363917/ https://www.ncbi.nlm.nih.gov/pubmed/30723250 http://dx.doi.org/10.1038/s41598-018-38437-y |
work_keys_str_mv | AT benzergaaamine plasticflowanisotropydrivesshearfracture AT thomasnithin plasticflowanisotropydrivesshearfracture AT herringtonjoshuas plasticflowanisotropydrivesshearfracture |