摘要
建立了搅拌摩擦焊接过程的三维瞬态传热模型,用移动热源模拟搅拌头的移动。模拟和研究不同搅拌头转速下对应的温度场,通过反问题分析方法给出了搅拌摩擦焊接热源移动模型中热输入功率与转速间的函数关系,通过这一函数表达式,计算出转速为400 r/min的热输入功率,并与试验结果进行对比,误差小于5%,从而验证文中提出的热输入功率与转速间的函数关系的正确性和有效性。
A three dimensional transient heat transfer model was presented to simulate the friction stir welding(FSW).A moving surfaceheat source was introduced to simulate the moving welding tool.An inverse analysis for the thermal numerical simulation was developed to determine the relationship between the rotational speed of the pin tool and the input power of the moving heat source.According to the established relationship,the input power for the case in 400 rpm was obtained.With comparison of the experimental data,the error in the numerical model is less than 5%,which can validate the established relationship between the rotational speed of the welding tool and the input power.
出处
《焊接》
北大核心
2012年第4期19-24,69-70,共6页
Welding & Joining
基金
国家自然科学基金资助项目(10802017)
国家重点基础研究发展计划(973计划)资助项目(2010CB832704)
辽宁省教育厅重点实验室项目(LS2010033)
关键词
搅拌摩擦焊
数值模拟
温度场
搅拌头
转速
friction stir welding
numerical simulation
temperature field
pin tool
rotational speed
