使用FLUENT流体工程仿真软件对搅拌摩擦焊缝金属的塑性流动进行数值模拟,初步得出搅拌摩擦焊焊缝塑性流体流动规律,并进行试验分析与验证.试验结果表明:随着距轴肩和搅拌针距离的增大,速度场开始减弱,焊缝金属由顶面向底面、由搅拌区向旋转区的流动也随之减弱;水平方向计算结果与试验结果基本吻合.搅拌工具旋转速度是影响接头成型形貌的关键原因之一,速度过低有可能会导致隧道型孔洞缺陷.
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