Micromechanical Study of Strength and Toughness of Advanced Ceramics

Files in This Item:
File Description SizeFormat 
ProcediaDMcN.pdf569.45 kBAdobe PDFDownload
Title: Micromechanical Study of Strength and Toughness of Advanced Ceramics
Authors: McNamara, DeclanAlveen, PatriciaCarolan, Declanet al.
Permanent link: http://hdl.handle.net/10197/5906
Date: 2014
Online since: 2014-09-29T09:50:00Z
Abstract: Numerical investigations using the finite volume (FV) method were conducted to examine the effect of microstructure and mi- crostructural properties on the fracture strength of advanced ceramics with industrial applications. Statistically representative microstructural volumes were created using a diffuse-interface model using OpenFOAM-1.6-ext. Crack initiation and growth was modeled using a recently developed arbitrary crack propagation model. It was found that by varying the Young's modulus of the second phase material, a significant change in the maximum failure load was observed. It was also shown that there exists an opti- mum Young's modulus for which a maximum failure load will be reached. A number of microstructures with a varying percentage second phase material were investigated in this study. Results indicate that for a given set of material and cohesive parameters the maximum failure load was insensitive to the percentage second phase material. This study highlights the role that microstructure adconstituent properties of brittle ceramics have on influencing the fracture strength of such material. With this in mind, a para- metric study was undertaken to examine the competition between crack deflection and crack penetration at the interface between two materials. It was found that appropriate choice of interface strength and toughness as well as second phase material compliance was required in order to promote an overall strength and toughness increase through crack deflection and bridging. Such numerical modeling is essential in order to gain a greater understanding into the structure-property relationship that exists for such advanced ceramics.
Type of material: Journal Article
Publisher: Elsevier
Journal: Procedia Materials Science
Volume: 3
Start page: 1810
End page: 1815
Copyright (published version): 2014 Elsevier
Keywords: Fracture strengthMicrostructural modelingFinite volume method.
DOI: 10.1016/j.mspro.2014.06.292
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

Show full item record

Page view(s) 50

Last Week
Last month
checked on Apr 9, 2020


checked on Apr 9, 2020

Google ScholarTM



This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.