摘要
采用ABAQUS/Explicit模块建立了搅拌摩擦焊接(FSW)的完全热力耦合三维计算模型,研究了10mm厚7050铝合金FSW过程中,不同材料的搅拌工具与垫板对焊接温度场演变的影响。研究结果表明:不同材料的垫板与搅拌工具对焊接温度场有一定的影响;通过搅拌工具与垫板的热传导是热量散失的主要方式;在焊接过程中,随着垫板换热系数的增加,工件上下表面各等温线以搅拌工具为中心向内明显收缩。
A fully thermo-mechanically coupled three-dimensional finite element model is developed for the whole process of friction stir welded 10 mm thick 7050 aluminum alloy by using ABAQUS/Explicit software. The effects of tool and backplate materials on the temperature filed evolution are systematically investigated. The results show that the tool and backplate materials have obvious influences on the temperature filed evolution. The heat loss is mainly attributed to the conduction by the tool and back- plate. All the isotherms gradually contract taking the tool as the center with the increase of the bottom convective coefficient during the welding process.
出处
《航空制造技术》
北大核心
2013年第4期62-64,68,共4页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(51005180)
凝固技术国家重点实验室自主研究课题(69-QP-2011)资助
关键词
搅拌摩擦焊
有限元分析
铝合金
温度场
Friction stir welding Finite element analysis Aluminum alloy Temperature field
