Study on distribution of heat generation during friction stir welding of aluminum alloy by numerical simulation
The solid-state material was driven to move by a rigid rotating tool during friction stir welding (FSW), so that severe plastic flow occurred, and large amount of heat was generated during the process. The distribution of heat generation rate was important for understanding the FSW process and was related to the material flow pattern inside the work piece. In this paper, the material flow pattern was calculated by using a Computational Fluid Dynamics (CFD) method. The conservation equations of mass, momentum and energy were solved. The solid state material was treated as non-Newtonian fluid, the viscosity of which was both temperature and strain rate dependent. The three-dimensional volumetric heat generation rate was considered as heat dissipation due to plastic deformation. The asymmetric heat generation rate, material flow pattern and temperature distribution was simulated. The resulted temperature distribution agreed with the published experimental data. The fraction of heat generation contributed by the pin was determined to be 5.82％.
Friction stir welding heat generation distribution numerical simulation
Chen Gaoqiang Sun Yanjun Dai Qilei Shi Qingyu
Department of Mechanical Engineering, Tsinghua University, Beijing, P.R. China, 100084
国际会议
济南
英文
1-13
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）