Abstract
Friction behavior is crucial for metal deformation and failure analysis. Tests on contact between specimens and rigid mold (S-S) and rubber (S-R) were conducted. Results show that S-S friction coefficient decreases with normal pressure, while S-R static friction coefficient increases and kinetic remains low. Friction coefficient is influenced by real contact area changes due to softer surface deformation. S-S friction depends on specimen strength, and S-R friction on rubber properties. A proposed friction model based on contact area variation accurately predicts friction changes with normal pressure and workpiece properties. Integrated with finite element simulation, the model improves efficiency and accuracy compared to classical Coulomb friction model.
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