知识与财富的链接
利用ANSYS Workbench与ANSYS nCode Designlife分别建立了搅拌摩擦焊过程搅拌头的静力学与疲劳模型. 结合搅拌摩擦焊过程中搅拌头受到的作用力载荷谱,以及推导出的搅拌头扭矩的计算公式,讨论了前进阻力、侧向力、下压力和扭矩对搅拌头疲劳寿命的影响. 仿真结果表明,搅拌摩擦焊接过程中搅拌针的根部是主要的应力集中区,造成搅拌头疲劳失效主要发生在搅拌针根部. 前进阻力是造成搅拌头疲劳失效的主要原因,侧向力及扭矩对疲劳失效的作用则比较小,下压力对于搅拌头的疲劳寿命的增加有利.
A static model and a fatigue model of rotational tool in the friction stir welding process were established respectively with ANSYS Workbench and ANSYS nCode Designlife. The effects of forward resistance, lateral force, longitudinal force and torque on the fatigue life were investigated based the load history of forces on the tool and the expression of torque. The results of numerical simulation show that the fatigue failure of tool always occurs in the root of pin, which results from stress concentration. The forward resistance is a major cause of the fatigue failure. The lateral force and the torque are the secondary causes of fatigue failure. Moreover, the longitudinal force can increase the fatigue life of the tool.
