Micromechanical modelling of ceramic based composites with statistically representative synthetic microstructures

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Title: Micromechanical modelling of ceramic based composites with statistically representative synthetic microstructures
Authors: Alveen, Patricia
Carolan, Declan
McNamara, Declan
et al.
Permanent link: http://hdl.handle.net/10197/5905
Date: Nov-2013
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
Copyright (published version): 2013 Elsevier
Keywords: Advanced ceramics;Microstructure;Voronoi tessellation;Numerical model;Image analysis;Finite volume analysis
DOI: 10.1016/j.commatsci.2013.08.006
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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