Further development of continuum FEM simulation for ceramic breeder pebble bed unit thermomechanics

Author

Tucker, Justin ; Chunbo Sam Zhang ; Ying, Alice ; Abdou, Mohamed

Author_Institution

Fusion Eng. Sci., Mech. & Aerosp. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA

fYear

2013

Firstpage

1

Lastpage

6

Abstract

This work introduces a unified cap model, implemented in ANSYS, to the field of ceramic breeder pebble bed thermomechanics. The developed continuum numerical model has been validated and applied to predict the temperature/stress-dependent creep phenomena and stress relaxation of Li₄SiO₄ pebble bed, and the temperature/stress distributions of a DEMO-like breeder unit. In addition, considering the essential of experimental data for deriving the constitutive equations and for model benchmarking, we designed and conducted oedometric compression, creep and stress relaxation tests.

Keywords

Tokamak devices; benchmark testing; creep; finite element analysis; fusion reactor blankets; fusion reactor theory; plasma toroidal confinement; stress relaxation; ANSYS; DEMO-like breeder unit; Li₄SiO₄ pebble bed; ceramic breeder pebble bed unit thermomechanics; constitutive equations; continuum FEM simulation; continuum numerical model; experimental data; model benchmarking; oedometric compression; stress distributions; stress relaxation tests; stress-dependent creep phenomena; temperature distributions; temperature-dependent creep phenomena; unified cap model; Creep; Finite element analysis; Mathematical model; Pistons; Strain; Stress; Temperature measurement; Ducker-Prager; FEM; pebble bed; stress relaxation; thermomechanics;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering (SOFE), 2013 IEEE 25th Symposium on

Conference_Location

San Francisco, CA

Print_ISBN

978-1-4799-0169-2

Type

conf

DOI

10.1109/SOFE.2013.6635428

Filename

6635428