- Pearsall, G.W. and Backofen, W.A., Frictional boundary conditions in plastic compression,
American Society of Mechanical Engineers -- Papers
pp. 8 - .
(last updated on 2007/04/10)
Distributions of normal stress, shear stress, and coefficient of friction were determined at interface between steel tool and plastically deforming aluminum disk, using 2 pressure sensitive pins imbedded in tool; course of liquid-lubricant breakdown was modified significantly by compression with periodic cycles of loading and unloading which resulted in lower friction stress for reactive lubricants, such as fatty acids, and in higher friction stress for inert lubricants, such as mineral oil.