Numerical and experimental study of the heat transfer process in friction stir welding
Numerical and experimental study of the heat transfer process in friction stir welding
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DOI：
10.1243/095440503762502297
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发表时间：
2003-01
期刊：
影响因子：
--
通讯作者：
M. Song;Radovan Kovacevic
中科院分区：
文献类型：
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作者：
M. Song;Radovan Kovacevic
摘要建立了详细描述搅拌摩擦焊三维瞬时换热过程的数学模型。这项工作既是理论工作，也是实验工作。采用显式中心差分格式求解控制方程，动态研究了刀具穿透、焊接和拆刀过程中的换热现象。从刀肩输入的热被模拟为摩擦热，来自工具销的热被建模为由销附近的塑性变形产生的均匀体积热。为了验证计算结果，还对焊接过程中的温度变化进行了测量。计算结果与实验数据吻合较好。
Abstract A mathematical model to describe the detailed three-dimensional transient heat transfer process in friction stir welding (FSW) is presented. This work is both theoretical and experimental. An explicit central differential scheme is used in solving the control equations, the heat transfer phenomena during the tool penetrating, the welding and the tool-removing periods that are studied dynamically. The heat input from the tool shoulder is modelled as a frictional heat and the heat from the tool pin is modelled as a uniform volumetric heat generated by the plastic deformation near the pin. The temperature variation during the welding is also measured to validate the calculated results. The calculated results are in good agreement with the experimental data.