The material is hardened steel and steel rollers. I had two options 0.1 or 0.3. I wanted to put 0.1 but the sheet was not fed at the entry, it bounced back. With 0.3 it goes in, but I feel 0.3 is closer to sheet rolling a bulk metal forming opeartion. What can be done?
Indeed the contact pressure is a key factor, especially with hardened steel (and probably surface roughness as well).
Basically it should be, in average, higher than the of flow (plastic) stress of the material in order to reduce the thickness of the strip.
I could suggest you to test several values of contact pressure, keeping the COF constant and equal to 0.1 first (0.3 seems rather high).
Hello,
just for understanding of the problem two questions from my side:
- what kind of friction model are we talking about? Straight Coulomb? Viscous approach? A combined approach?
- why the restriction to either 0.1 or 0.3?
At least the first question i mandatory, since without the type of modeling approach it is (from my humble point of view) impossible to interpret the given numbers. If if would be Coulomb I'd also say, that 0.3 seems rather high; if we're talking viscous, it's quite okay on the other hand.
Kind regards.
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