Abstract
AMONTONS' law1 of the direct proportion between the frictional force and the applied normal load has been shown to be valid when the actual area of contact is a small proportion of the nominal area of contact. Recently2, experimental results obtained under conditions of extreme pressure (in lubrication literature bearing-pressures of at least 15,000 kgm.-wt./cm.2 are termed extreme pressures) were presented to indicate that, within the region of the validity of Amontons' law, lubricants which reduced the thermo-electromotive forces3 generated at the area of actual contact also reduced the final wear diameter produced by a revolving steel ball loaded against a metal plate.
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References
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Schnurmann, R., Paper presented in Section III of the 6th Inter. Conf. of Appl. Mech., Paris, Sept. 25, 1946.
Schnurmann, R., Nature, 151, 420 (1943).
This was a home-made instrument of the Boerlage type (Engineering, 136, 46 ; 1933) using 3/8-in. steel balls. Experimental details will be given in the M.Sc. Thesis of H. J. Bezer.
Jones, H. A., Langmuir, I., and Mackay, G. M. J., Phys. Rev., 30, 201 (1927).
Whittaker, E. J. W., Nature, 159, 541 (1947).
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BEZER, H., SCHNURMANN, R. Rate of Wear in the Region of the Validity of Amontons' Law. Nature 161, 728 (1948). https://doi.org/10.1038/161728a0
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DOI: https://doi.org/10.1038/161728a0
