基于oldroyd-B本构模型的磨料流加工壁面滑移仿真分析  

Simulation analysis of wall sliding in abrasive flow machining based on oldroyd-B constitutive model

作　　者：刘月普 董志国[1] 轧刚[1] 

机构地区：[1]太原理工大学机械工程学院,太原030024

出　　处：《现代制造工程》2014年第8期74-77,96,共5页Modern Manufacturing Engineering

摘　　要：基于oldroyd-B粘弹性本构模型,应用POLYFLOW软件对流体磨料在圆管中的壁面滑移状态进行了模拟仿真。将得到的圆管中流体磨料的压力值与磨料流加工机床上测试点的压力值进行比较,得到二者的相对误差不超过5%,验证了模拟仿真的可行性。通过仿真可知,流体磨料在工件壁面上的滑移存在速度临界点。通过比较不同管道入口流量、流体磨料黏度和壁面滑移系数对壁面滑移速度的影响可知,当管道入口流量越大、流体磨料的黏度越高,以及壁面滑移系数越小时,加工过程中的壁面滑移速度越大。Based on the viscoelastic constitutive model of oldroyd-B,the wall sliding condition of abrasive fluid in pipe was numer-ical simulated by POLYFLOW software .By comparing the pressure points in pipe tested on the abrasive flow machining tool with the results,the error was less than 5%,so the feasibility of numerical simulation was verified .Simulation shows that abrasive slid-ing on the wall of piecework exists velocity critical point .Then the effects of different inlet flow ,fluid abrasive viscosity and wall sliding coefficient on wall sliding were compared ,the results show that the larger of the inlet flow ,the higher of the fluid abrasive viscosity,and the smaller of the wall sliding coefficient ,the higher the wall sliding velocity will be in processing .

关 键 词：磨料流加工 粘弹性本构方程 数值模拟 壁面滑移 

分 类 号：TG664[金属学及工艺—金属切削加工及机床] TG73