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搅拌摩擦焊是轻金属连接的创新工艺。针对铝合金板AA2024-T3对接焊,建立双热源数值计算模型,综合考虑搅拌轴肩转动摩擦生热和搅拌头塑变剪切生热。通过ANSYS开发实现瞬态移动热交换有限元仿真,获得全程三维温度场分布。仿真结果与英国剑桥大学标准实验数据吻合良好,表明仿真模型可行,仿真结果合理,有助于进一步实现搅拌摩擦焊热-应力交互耦合仿真。
Friction stir welding is an innovative process of light metal joining. Aiming at the AA2024-T3 butt welding of aluminum alloy plate, a numerical model of double heat source was established, considering the heat generated by the rotation of the stirrer shaft and the plastic deformation shear heat of the mixing head. By ANSYS development to achieve transient mobile heat exchange finite element simulation, the full three-dimensional temperature field distribution. The simulation results agree well with the standard experimental data of Cambridge University in the UK, which shows that the simulation model is feasible and the simulation results are reasonable. It is helpful to further simulate the thermo-mechanical coupling of friction stir welding.