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Thermal and mechanical properties of ceramic blanket particle bed materials: Numerical derivation

Summary: Thermal and mechanical properties of ceramic blanket particle
bed materials: Numerical derivation
Mohamed Abdou *, Alice Ying, Zi Lu
43-133 Engineering IV, Institute of Plasma and Fusion Research, Mechanical and Aerospace Engineering Department, 44-114,
Engineering IV, University of California, Los Angeles CA 90095-1597, USA
In this paper, recent work on the modeling for predicting the eective thermal and mechanical properties of the
ceramic breeder blanket particle bed materials is presented. The model is based on the micromechanics displacement
method in conjunction with an iterative process of the successive releasing of ®xing vectors. It serves as an useful tool to
study the blanket thermomechanical state under prototypical conditions. The stress and strain relationship of the
sphere-pac bed under an applied external constraint was studied. In addition, the model was applied to the analysis of
stress exerted on the container wall due to bed thermal expansion, while calculations were made to estimate the bed
eective modulus and mean thermal expansion coecient. Further development of this computer simulation model is
recommended. Ó 1998 Elsevier Science B.V. All rights reserved.
1. Introduction
In an eort to evaluate the maximum stress levels to
which bed particles and clad wall are subjected, the
stress-strain behavior of the solid breeder blanket parti-
cle bed materials have been experimentally studied [1,2].
A series of uniaxial compression tests were performed in


Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles


Collections: Plasma Physics and Fusion