铝合金搅拌摩擦焊热源模型建模专家系统

在铝合金搅拌摩擦焊三维体积热源模型建模过程中,轴肩、搅拌针侧面以及搅拌针底面摩擦产热的热流密度加载范围存在不确定性,需校核确定,增加了建模难度与工作量.针对该问题,建立三维搅拌摩擦焊热源模型,并确定其不确定热源模型参数,研究了这些参数变化对模拟焊缝温度的影响规律.在此基础上,基于参数变化影响规律建立了搅拌摩擦焊热源模型...

Friction stir welding of aluminum alloy heat source model expert system

In establishing model process of three-dimensional heat source model of aluminum alloy friction stir welding,heat flux density range of shoulder,stir pin's side and bottom generating heat quantity is uncertain,which needs certainty through verification,increases the difficulty and workload of modeling.For this problem,three-dimensional friction stir weld heat source model is established,and uncertain parameters in heat source model are determined.At the same time,effect of these parameters changing for welding temperature is researched in the simulation.In addition,according to the effect law of parameters changing,library of parameters of friction stir welding heat source is established and inference rules are designed.Friction stir welding of aluminum alloy heat source model expert system of fast establishing model are achieved.Finally,temperature field results of friction stir welding experiment have validated expert system function.Expert system significantly reduce difficulty of numerical simulation of friction stir welding,and is beneficial to promote the popularization and application of numerical simulation technology of friction stir welding of aluminum alloy.