Numerical Simulation Of T-welding Residual Stress And Strength Analysis

In the shipbuilding process, T-welded structures are employed in building's every working procedure largely. The existence of the welding residual stress is the main reason to impact on the strength and the carrying capacity of the hull steel. At this stage, it is very difficult to control and eliminate all of welding residual stress. Thus, in order to make sure that it is safety and reliability of welded structures hull, it's a very important task to accurately obtaining welding residual stress's distributing rule and the stacking effect by residual stress and external load. Finally, the ship inspection department consider will pay attention to the welding residual stress when they take strength verification. After studying former research, this paper studies nether contents using theories analysis method and finite element numerical simulation method (ANSYS):1. To establish the numerical calculation model of the T-joint submerged arc welding residual stress, and determine the boundary conditions as well as the material properties of the thermal elastic-plastic. To resolve some key issues of element birth and death technology, latent heat, convection coefficient and effective power factor of heat inputing.2. Making a v-break, T-welding numerical simulation of 12mm thick steel plate for example , analyzing welding temperature field and welding stress field, obtaining welding residual stress's distributing rule.3. Strength checking of T-welded structure(whether have the residual stress), Comparing the results of strength checking with both cases.