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Fusion Engineering and Design 4950 (2000) 605611 Numerical and experimental prediction of the

Summary: Fusion Engineering and Design 4950 (2000) 605611
Numerical and experimental prediction of the
thermomechanical performance of pebble beds for solid
breeder blanket
Zi Lu *, Alice Y. Ying, Mohamed A. Abdou
Mechanical and Aerospace Engineering Department, UCLA, Los Angeles, CA 90095-1597, USA
In this paper, recent numerical modeling and experiment work for predicting the effective thermal and mechanical
properties of solid breeder blanket pebble bed materials is presented. The numerical modeling is based on the
micro-mechanics displacement method in conjunction with an iterative process of successive releasing of the contact
force of particles. Initial and final packed states for particle assembly and the contact forces for particles have been
studied. In addition, a test article has been constructed to measure the thermal stress induced by the thermal
expansion of the solid particle and to estimate the characteristic properties of particle materials. Corresponding
experiments are carried out with aluminum and Li2ZrO3 pebble beds. Empirical correlations for the moduli of
deformation are presented. These experiment data are compared with the numerical modeling results. 2000 Elsevier
Science B.V. All rights reserved.
Keywords: Thermomechanical performance; Pebble beds; Solid breeder blanket
1. Introduction
In many of the fusion reactor blanket designs,


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


Collections: Plasma Physics and Fusion