Skip to main content

Research Repository

Advanced Search

Effects of compositions of filler, binder and porosity on elastic and fracture properties of nuclear graphite

Kyaw, Si Thu; Sun, W.; Becker, Adib A.

Authors

SI KYAW Si.Kyaw@nottingham.ac.uk
Senior Mechanical Engineer - Turbines

W. Sun

Adib A. Becker



Abstract

Physical mechanisms at different length scales have to be taken into account while predicting the overall failure of nuclear graphite structures of advanced gas cooled graphite reactors. In this paper, the effect of composition of meso graphite phases and porosity on the aggregate elastic properties is predicted using the Eshelby homogenisation method. Results indicate an overall decrease in elastic modulus with an increase in porosity. Subsequently, the moduli at different porosity levels are used to predict the critical strain energy release rates for crack propagation of graphite, and fracture behaviour is studied using compact tension and four point bending tests. Compared to flexural strength at zero porosity level, significant reduction in strength of up to 80% at 30% porosity level is observed. Evolution of flexural strength due to porosity is also compared against available experimental values of graphite from UK nuclear plants.

Journal Article Type Article
Publication Date Feb 2, 2015
Journal Journal of Nuclear Materials
Print ISSN 0022-3115
Electronic ISSN 0022-3115
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 457
APA6 Citation Kyaw, S. T., Sun, W., & Becker, A. A. (2015). Effects of compositions of filler, binder and porosity on elastic and fracture properties of nuclear graphite. Journal of Nuclear Materials, 457, https://doi.org/10.1016/j.jnucmat.2014.10.071
DOI https://doi.org/10.1016/j.jnucmat.2014.10.071
Keywords Nuclear graphite, micromechanics, graphite phases,
fracture mechanics
Publisher URL http://www.sciencedirect.com/science/article/pii/S0022311514007557
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

Files

2015-Kyaw (ePrint Version).pdf (535 Kb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





You might also like



Downloadable Citations

;