Finite Element Simulation For Tungsten-the First Wall Material Of Fusion Reactor

Composite materials are becoming more and more important in our daily life. To achieve specific goal in different areas, researches about new composite materials with different performance is the biggest problem in material study. Meanwhile, simulation and analysis of various performance of new composite materials, especially structural aspects have become very important. With the development of computer technology, lots of complex issues can be solved by the Computer-Aided Engineering (CAE) technology, of which the core processing method is the finite element analysis (FEA).In this article, the Computer Aided Engineering (CAE) systems is introduced briefly at first. Then the physical and mathematical theory of its core processing-finite element analysis method is explained clearly. A simple one-dimensional situation is used to clarify the finite element method consistently, pointing out that the most important is to select the proper form about the unit interpolation function. When the load of the plate is unidirectional, calculation of stress concentration phenomenon at the hole in the plate center is conducted. The formula of stress calculation of the finite plate center hole is given from the elasticity theory aspect, and then the results of theoretical and simulation calculations are compared.Finally, thermal and structure coupling method is used to simulate the first wall (face plasma directly) material in the International Thermonuclear Experimental Reactor. Analysis of mechanical and thermal properties of the first wall material inside hole’s, and calculation of materials’temperature, stress and strain with multiple plasma heat flux, combined with high-energy neutron heating, simulation results of performance variation and property differences of the material is given under the plasma and neutron combined effects.