Analysis of two-phase ceramic composites using micromechanical models

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Title: Analysis of two-phase ceramic composites using micromechanical models
Authors: Alveen, Patricia
McNamara, Declan
Carolan, Declan
et al.
Permanent link: http://hdl.handle.net/10197/5928
Date: Sep-2014
Abstract: Micromechanical models of two-phase ceramic composites are created using a modified Voronoi tessellation approach. These representative Finite Volume (FV) microstructures are used to investigate the role of microstructure on fracture of advanced ceramics. An arbitrary crack propagation model using a cell-centred finite volume based method is implemented. In particular the effect of matrix content is examined. It is shown that the underlying microstructure significantly affects the local stress and strain distributions for a two-phase ceramic containing hard particles in a softer matrix. Simulation results indicate that an increase in the volume fraction of these hard grains leads to an increase in strength of the composite material. Furthermore, it is found that the homogeneity of the microstructure affects the overall strength.
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2014 Elsevier
Keywords: Microstructure;Voronoi tessellation;Numerical model;Finite volume analysis;Brittle fracture
DOI: 10.1016/j.commatsci.2014.05.061
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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