A three-dimensional computational model for intergranular cracking

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A three-dimensional computational model for intergranular cracking

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Publication Article, peer reviewed scientific
Title A three-dimensional computational model for intergranular cracking
Author(s) Jivkov, Andrey ; Stevens, N.P.C. ; Marrow, T.J.
Date 2006
English abstract
A three-dimensional mechanical model for intergranular crack propagation is presented. The model follows the spirit of existing percolation-like models but offers the inclusion of mechanical effects. This is necessary in order to account more accurately for the crack driving force and the effect of crack bridging ligaments, observed experimentally to be formed by fracture resistant boundaries. The model uses a regular representation of the material's microstructure and a categorisation of grain boundaries as beneficial and detrimental to fracture. This categorisation makes the model applicable to assessing material's resistance to intergranular stress corrosion cracking. The model mechanical behaviour is consistent with experimental observations and demonstrates its capability of simulating the development of bridges in the crack wake as well as crack coalescence. Results show that increasing the fraction of resistant boundaries increases the degree of crack tip shielding developed. This is expected to increase the resistance to stress corrosion crack propagation. The model offers a significant reduction of the computational resources usually needed to simulate intergranular propagation.
DOI http://dx.doi.org/10.1016/j.commatsci.2006.03.012 (link to publisher's fulltext)
Host/Issue Computational Materials Science;3
Volume 38
ISSN 0927-0256
Pages 442-453
Language swe (iso)
Subject(s) Technology
Research Subject Categories::TECHNOLOGY
Handle http://hdl.handle.net/2043/4775 (link to this page)

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