Journal
SCRIPTA MATERIALIA
Volume 65, Issue 11, Pages 1002-1005Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.09.004
Keywords
Flat fracture; Slant fracture; Lode parameter; Shear; X-ray tomography
Categories
Funding
- ESRF [ID19]
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Tomography examination of arrested cracks at crack initiation, flat to slant transition and slant propagation indicates a clear change in micromechanisms from high-stress triaxiality void growth to shear-dominated coalescence in the slant regime. A Gurson-type model is used and a shear void nucleation term based on the Lode parameter for strain rate is suggested for simulation of a fully meshed sample, which achieves flat to slant crack transition at loads close to experimental results for aluminium. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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