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Micromechanical modelling of ceramic based composites with statistically representative synthetic microstructures
Date Issued
2013-11
Date Available
2014-09-29T09:49:11Z
Abstract
A combined experimental–numerical method was used to investigate the role of microstructure on the fracture of advanced ceramics. In particular, the effect of grain size and matrix content were examined. Two dimensional representative finite volume (FV) microstructures were created using Voronoi tessellation to synthetically represent the microstructure of a two phase ceramic composite. It is shown, by comparing with real micrographs, that the method captures the features of real microstructures in terms of grain size distribution, grain aspect ratio and the distribution of second phase agglomerations. Simulation results indicate the computed elastic parameters are within the Hashin–Shtrikman bounds and also agree well with the Eshelby–Mori–Tanaka method. It is found that the underlying microstructure significantly affects the local stress and strain distributions in these advanced ceramics.
Type of Material
Journal Article
Publisher
Elsevier
Journal
Computational Materials Science
Volume
79
Start Page
960
End Page
970
Copyright (Published Version)
2013 Elsevier
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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