標題: A mixed lubrication model for computer simulation of extrusion processes
作者: Hsu , TC
Li, YM
Hung, CH
機械工程學系
Department of Mechanical Engineering
關鍵字: mixed lubrication;finite element method;surface roughness
公開日期: 1-十月-2000
摘要: A mixed lubrication/friction model for extrusion process is developed in the present research. The model combines a rigid-plasticity finite element code to simulate the interface condition between the tooling and workpiece in the extrusion operation. The influence of surface roughness on lubricant flow is treated by using the average Reynolds equation. The active lubrication regime and appropriate friction factor were determined from the current local values of interface variables such as mean lubricant film thickness and workpiece and tooling roughness, in addition to the more traditional external variables such as interface pressure, node sliding velocity and strain rate of the workpiece. Numerical results using the coupled code include friction stress and normal pressure under different lubrication conditions are compared with experimental investigation. The discrepancy is very small and the proposed model proved to be very efficient in predicting interface friction condition in the extrusion processes.
URI: http://hdl.handle.net/11536/30234
ISSN: 1040-2004
期刊: TRIBOLOGY TRANSACTIONS
Volume: 43
Issue: 4
起始頁: 781
結束頁: 787
顯示於類別:期刊論文


文件中的檔案:

  1. 000089475300029.pdf