Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1497
Title: On localization and void coalescence as a precursor to ductile fracture
Authors: Tekoğlu, Cihan
Hutchinson, J. W.
Pardoen, T.
136331
Keywords: ductile fracture
localization
void coalescence
Lode parameter
shear
Issue Date: 28-Mar-2015
Publisher: Royal Soc
Source: Tekoglu, C., Hutchinson, J. W., & Pardoen, T. (2015). On localization and void coalescence as a precursor to ductile fracture. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 373(2038), 20140121.
Abstract: Two modes of plastic flow localization commonly occur in the ductile fracture of structural metals undergoing damage and failure by the mechanism involving void nucleation, growth and coalescence. The first mode consists of a macroscopic localization, usually linked to the softening effect of void nucleation and growth, in either a normal band or a shear band where the thickness of the band is comparable to void spacing. The second mode is coalescence with plastic strain localizing to the ligaments between voids by an internal necking process. The ductility of a material is tied to the strain at macroscopic localization, as this marks the limit of uniform straining at the macroscopic scale. The question addressed is whether macroscopic localization occurs prior to void coalescence or whether the two occur simultaneously. The relation between these two modes of localization is studied quantitatively in this paper using a three-dimensional elastic-plastic computational model representing a doubly periodic array of voids within a band confined between two semi-infinite outer blocks of the same material but without voids. At sufficiently high stress triaxiality, a clear separation exists between the two modes of localization. At lower stress triaxialities, the model predicts that the onset of macroscopic localization and coalescence occur simultaneously. [GRAPHICS] .
URI: https://doi.org/10.1098/rsta.2014.0121
https://hdl.handle.net/20.500.11851/1497
ISSN: 1364-503X
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

Show full item record

CORE Recommender

SCOPUSTM   
Citations

91
checked on Sep 23, 2022

WEB OF SCIENCETM
Citations

93
checked on Sep 24, 2022

Page view(s)

28
checked on Dec 26, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.