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

Lianshan Lin; Haiyan Li; Alex Fok; Mark Joyce; James Marrow

doi:10.1016/j.jnucmat.2008.07.042

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

Lianshan Lin, Haiyan Li, Alex Fok, Mark Joyce, James Marrow

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

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. © 2008.

Original language	English
Pages (from-to)	158-164
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	381
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jnucmat.2008.07.042
Publication status	Published - 31 Oct 2008

Keywords

Reactor cores (characterization of heterogeneity and nonlinearity in material properties of nuclear graphite using inverse method)
inverse method nuclear graphite material property heterogeneity nonlinearity

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10.1016/j.jnucmat.2008.07.042

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title = "Characterization of heterogeneity and nonlinearity in material properties of nuclear graphite using an inverse method",

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. {\textcopyright} 2008.",

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AU - Li, Haiyan

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AU - Joyce, Mark

AU - Marrow, James

N1 - CAN 151:207094 71-3 Nuclear Technology Journal 0022-3115 written in English 7782-42-5 (Graphite) Role: TEM (Technical or engineered material use), USES (Uses) (characterization of heterogeneity and nonlinearity in material properties of nuclear graphite using inverse method)

PY - 2008/10/31

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N2 - 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. © 2008.

AB - 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. © 2008.

KW - Reactor cores (characterization of heterogeneity and nonlinearity in material properties of nuclear graphite using inverse method)

KW - inverse method nuclear graphite material property heterogeneity nonlinearity

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DO - 10.1016/j.jnucmat.2008.07.042

M3 - Article

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EP - 164

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-2

ER -

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

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Keywords

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