Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7196474 | Theoretical and Applied Mechanics Letters | 2018 | 5 Pages |
Abstract
This paper presents the derivation of a first order friction model for lubricated sheet metal forming. Assuming purely plastic real contacts, Newton's law of viscosity, and a square root behavior of the hydrodynamic coefficient of friction with respect to the hydrodynamic Hersey parameter an analytic model is found. The model predicts the coefficient of friction as a function of the relative pressure, the relative Hersey parameter and the real contact coefficient of friction. Questions about local and global friction are raised in the validation of the model against flat tool sheet experiments. For some flat tool sheet experiments reasonable agreements are obtained assuming a rigid punch pressure distribution. The restricted number of user inputs makes the model useful in early tool design simulations.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Hans B. Löfgren,