Title
Simulation of ductile crack initiation and propagation by means of a non-local Gurson-modelSimulation of ductile crack initiation and propagation by means of a non-local Gurson-model
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Oxford,
Subject
Physics
Source (journal)
International journal of solids and structures. - Oxford
Volume/pages
50(2013):5, p. 662-671
ISSN
0020-7683
ISI
000314015200005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
In the present study a non-local GTN-model in an implicit gradient-enriched formulation is employed to simulate ductile crack growth under small-scale yielding conditions numerically. The problem in handling full material failure in a non-local damage model is pointed out. An approach is presented to deal with this problem and a numerical implementation is derived. This technique allows to simulate large amounts of crack growth. The results show that the model captures correctly the states of initial crack tip blunting, crack initiation and crack propagation if a sufficiently fine mesh is used. A systematic parameter study is performed. On this basis, a procedure to determine the model parameters from experiments is proposed. (c) 2012 Elsevier Ltd. All rights reserved.
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