Quote:
Originally Posted by VEN
can i take chromium on chromium friction and copper on copper friction and average it out?
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I don't think that will work ... based on information from the table (website) referenced above:
Static Friction example:
Copper / Copper - 1.0 (my source "
Marks Handbook" shows 1.21)
Mild Steel / Mild Steel - .74
Average would be .87, table says (Copper / Mild Steel) .53
Copper / Copper - 1.0
Cast Iron / Cast Iron - 1.1
Average - 1.05, table says 1.05 (WOW !) -
except my source says Cu/Cu: 1.21
Anyway, that doesn't seem to be a reliable way to estimate the friction coefficient. Also, I am sure you are aware that MANY factors can affect your actual friction. Surface finish/roughness, Lubrication, Contamination, Oxidation ...
Your best bet is to experiment with samples of the material you are interested in and collect your own data (as Imajie just posted
).