Peridynamic simulations of the tetragonal to monoclinic phase transformation in zirconium dioxide
File(s)
Accepted version
Author(s)
Platt, P
Mella, R
DeMaio, W
Preuss, M
Wenman, MR
Type
Journal Article
Abstract
Whether present as a manufactured stabilised ceramic, or as an oxide layer on zirconium alloys, mechanical degradation in zirconia is influenced by the tetragonal to monoclinic phase transformation. Peridynamic theory was implemented within the Abaqus finite element framework to understand how the tetragonal to monoclinic phase transformation can itself cause fracture in zirconia. In 2D these simulations represent a single grain, transforming via an isometric dilational expansion, surrounded by a homogenous monoclinic oxide. The effect of transformation time, applied bi-axial pressure, and the fracture strain were assessed using the change in strain energy and the amount of damage in the oxide surrounding the transformed grain. Reducing the applied compressive stress or applying a tensile stress reduces the transformation strain energy. The introduction of a fracture strain leads to damage in the surrounding oxide region largely in the form of cracks, and reduces the transformation strain energy further by reducing the constraint on the transforming grain. The extent of the fracture, and reduction in constraint on the transformed grain, is more significant with the application of a biaxial tensile pressure.
Date Issued
2017-09-15
Date Acceptance
2017-09-01
Citation
Computational Materials Science, 2017, 140, pp.322-333
ISSN
0927-0256
Publisher
Elsevier
Start Page
322
End Page
333
Journal / Book Title
Computational Materials Science
Volume
140
Copyright Statement
© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Rolls-Royce Plc
Engineering & Physical Science Research Council (EPSRC)
Grant Number
5200026668
EP/J017574/1
Subjects
0912 Materials Engineering
0204 Condensed Matter Physics
Materials
Notes
publisher: Elsevier articletitle: Peridynamic simulations of the tetragonal to monoclinic phase transformation in zirconium dioxide journaltitle: Computational Materials Science articlelink: http://dx.doi.org/10.1016/j.commatsci.2017.09.001 content_type: article copyright: © 2017 Published by Elsevier B.V.
Publication Status
Published