I am solving an impact problem using contact AUTOMATIC SURFACE TO SURFACE in LS DYNA. Can anyone explain me the role of defining friction (static and dynamic) in the contact surface model?
Hi @arun9660,
The static and dynamic friction coefficients define how easily (or difficult) the slave and master side of the contact slide across one another. Just like real-life friction coefficients.
For example, if you had a contact defined between a metal part and a glass part you could lookup "friction coefficient between metal and glass." You would probably stumble upon this website or something similar:
https://www.engineeringtoolbox.com/friction-coefficients-d_778.html
And glass to metal would have a friction coefficient between 0.5 to 0.7 if dry or 0.2 to 0.3 if lubricated.