Characterization of heterogeneity and nonlinearity in material properties of nuclear graphite using an inverse method

Lianshan Lin, Haiyan Li, Alex S.L. Fok, Mark Joyce, James Marrow

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A finite-element-based inverse method has been developed to allow the characterization of the heterogeneity and nonlinearity in material properties of isotropic nuclear graphite using a single experimental test. The method is implemented into the commercial finite element code ABAQUS using its User Material (UMAT) Subroutine for ease of application. The program has been verified using simulated examples with idealized distributions of elastic modulus and the results showed rapid convergence with good accuracy. Finally, the method was applied to actual mechanical testing of nuclear graphite for which the heterogeneous distribution and nonlinearity of material properties were evaluated.

Original languageEnglish (US)
Pages (from-to)158-164
Number of pages7
JournalJournal of Nuclear Materials
Volume381
Issue number1-2
DOIs
StatePublished - Oct 31 2008

Bibliographical note

Funding Information:
The financial support of Nexia Solutions is gratefully acknowledged. The graphite material was kindly supplied by British Energy Generation Ltd. The views expressed in this paper are those of the authors and do not necessarily represent the views of the sponsor.

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

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