铝合金搅拌摩擦焊液冷流道承压力学模型

Mechanical Model of Friction Stir Welding Aluminum Alloy Liquid Cooling Channel with Internal Pressure

为了实现液冷组件的可靠性设计,并且缩短液冷流道结构的设计周期,文中在通过力学仿真计算获得大量仿真数据的基础上,探索了流道承压共性规律,明确了液冷流道承压最大应力响应的影响因素及影响规律。结果表明,搅拌摩擦焊液冷流道内部的最大等效应力与盖板厚度呈反比,与盖板承压宽度的平方呈正比,与内压呈正比,在此基础上,建立了液冷流道承压力学模型σ=KPL2H-1,其中,对于铝合金液冷组件,K=0.243 mm-1。该承压力学模型为液冷组件提供了力学设计依据,根据液冷组件流道内压可以快速明确其几何尺寸,大大提高了设计效率,且广泛适用于采用其他焊接方法制造的同结构类型的液冷组件。

In order to realize the reliability design of the liquid cooling component and shorten the structural design cycle of the liquid cooling channel,this paper explores the common laws of the channel pressure based on the large amount of mechanical simulation results.The influence factors and laws of the maximum stress response of the channel pressure are clarified.Results show that the maximum stress in the friction stir welding liquid cooling channel is inversely proportional to the thickness of the cover plate,is proportional to the square of the bearing width of the cover plate,and is proportional to the channel internal pressure.Then the mechanical modelσ=KPL2H-1 for the pressure of the liquid cooling channel is established,for aluminum alloy liquid cooling component,K=0.243 mm-1.The mechanical model provides mechanical design basis for the liquid cooling component.Fast selecting the geometrical dimension of the liquid cooling component according to its channel internal pressure greatly improves the design efficiency.It is widely applicable to the liquid cooling components with similar structural features manufactured by other welding techniques.