Title :
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
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;
Conference_Titel :
Fusion Engineering (SOFE), 2013 IEEE 25th Symposium on
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-0169-2
DOI :
10.1109/SOFE.2013.6635428
