Title
Simulation of local instabilities during crack propagation in the ductile-brittle transition region Simulation of local instabilities during crack propagation in the ductile-brittle transition region
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Paris ,
Subject
Physics
Source (journal)
European journal of mechanics: A: solids. - Paris
Volume/pages
30(2011) :3 , p. 195-203
ISSN
0997-7538
ISI
000289605400001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The crack propagation for a cohesive zone model within an elastic-plastic material under small-scale yielding conditions is simulated numerically. The resulting crack growth resistance curves show local instabilities, so-called pop-ins even for homogeneous cohesive properties if the cohesive strength lies sufficiently close to the maximum stress of the corresponding blunting solution. The formation of secondary cracks and unloading zones in front of the actual crack tip is identified as the underlying mechanism. It is found that the shape of the cohesive law has a considerable influence on the crack arrest behavior. Furthermore, requirements to the mesh resolution are derived. (C) 2011 Elsevier Masson SAS. All rights reserved.
E-info
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