Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2011, Vol. 22 ›› Issue (3): 185-192 doi: 10.13538/j.1001-8042/nst.22.185-192

• NUCLEAR ENGINEERING • Previous Articles    

A method for 3D simulation of internal gas effects on thermal-mechanical behaviors in nuclear fuel elements

JIANG Yijie CUI Yi HUO Yongzhong DING Shurong~*   

  1. Department of Mechanics and Engineering Science,Fudan University,Shanghai 200433,China
JIANG Yijie, CUI Yi, HUO Yongzhong, DING Shurong. A method for 3D simulation of internal gas effects on thermal-mechanical behaviors in nuclear fuel elements.Nuclear Science and Techniques, 2011, 22(3): 185-192     doi: 10.13538/j.1001-8042/nst.22.185-192

Abstract:

A new method for three-dimensional simulation of the interaction between the gas and the solid around is developed.The effects of the gas on the thermal-mechanical behaviors within the surrounded solid are performed by replacing the internal gas with an equivalent solid in the modeling,which can make it convenient to simulate the thermal-mechanical coupling effects in the solid research objects with gases in them.The applied thermal expansion coefficient,Young's modulus and Poisson's ratio of the equivalent solid material are derived.A series of tests have been conducted; and the proposed equivalent solid method to simulate the gas effects is validated.

Key words: Gas conductivity, Gas pressure, Equivalent solid method, Numerical simulation, Nuclear fuel elements, Thermal-mechanical behaviors, Fission gas release