Strain-driven corrosion crack growth: A pilot study of intergranular stress corrosion cracking

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Strain-driven corrosion crack growth: A pilot study of intergranular stress corrosion cracking

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Publication Article, peer reviewed scientific
Title Strain-driven corrosion crack growth: A pilot study of intergranular stress corrosion cracking
Author Jivkov, Andrey ; Ståhle, Per
Date 2002
English abstract
This work proposes a model for corrosion driven crack growth. The model poses a moving boundary problem, where a chemical attack removes material from the body. The rate of the chemical attack is a function of the strain along the body surface. No crack growth criterion is needed for the analysis. A finite strain formulation is used and the material model is assumed hyperelastic. The problem is stated for a large body, containing a large crack. A low frequency cyclic loading is considered. Thus, corrosion is assumed to dissolve material with a rate approximately proportional to the strain rate. The problem is solved using finite element method based program, enhanced with a procedure handling the moving boundary. Parametric studies are performed for a series of different initial shapes of the near-tip region. Presented results show that the crack growth rate is largely dependent on the initial crack geometry. For a set of initial shapes and load levels steady-state conditions of growth are achieved, while for the others the cracks show tendency to branch.
DOI http://dx.doi.org/10.1016/S0013-7944(02)00017-6 (link to publisher's fulltext)
Host/Issue Engineering Fracture Mechanics;18
Volume 69
ISSN 0013-7944
Pages 2095-2111
Language swe (iso)
Subject Technology
Research Subject Categories::TECHNOLOGY::Materials science
Handle http://hdl.handle.net/2043/4792 Permalink to this page
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