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

作者：Jiang Yijie; Cui Yi; Huo Yongzhong; Ding Shurong^*

来源：Nuclear Science and Techniques, 2011, 22(3): 185-192.

• Gas conductivity
• Gas pressure
• Equivalent solid method
• Numerical simulation
• Nuclear fuel elements
• Thermal-mechanical behaviors
• Fission gas release

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.

• 出版日期2011-6
• 单位复旦大学