Question: what is fkn in ansys?
Answer: Real Constant(3): Normal Penalty Stiffness Factor (FKN) Users control the initial contact stiffness used by multiplying the calculated value by a factor, FKN. The default value for FKN used in ANSYS (APDL or Wizard) is 1.0. In Workbench, FKN = 10 if only linear contact is active (bonded or no separation).