The Three-dimensional Finite Element Numerical Simulation Of The Temperature Field And The Residual Stress Field In Aluminum Alloy Canister Structures

Welding is a complicated physicochemical process which involves in electromagnetism, heat transferring, metal melting and freezing, phase-change, welding stress and deformation and so on. Because of the complexity of welding process, the research of weld process produce hot and stress through method of experiment is very difficulty. With the development of computer science and technology, numerical simulation of welding phenomena has become a hot research topic domestically and abroad and has also been put into wide use. Finite Element Method (FEM) is used here to simulate the temperature field and the residual stress field in the Canister structures, to analysis the hot, stress behavior in weld process. Probe the distribution rule of stress field and temperature field. On the basis of finite element theory and fundamental equation, ANSYS, as a large FEM analysis software used here, a three-dimensional finite element numerical simulation is founded, to simulate the temperature and stress field of this kind of canister structures. Distributions of axial and hoop residual stresses at the weld and weld vicinity on inner surface of canister are tensile, and they are gradually transferred into compressive with increase of distance away from the weld joint. The axial residual stresses at the weld and weld vicinity on outer surface of canister is compressive while the hoop one is tensile. Some experiments were carried out to verify the simulation results. The experimental results show mostly conformity compared with the FEA results.