The default value of penalty stiffness scale factor in Ansys-Lsdyna is 0.1, when one varies this value, he/she obtains different results, the question, how can one know the right value of penalty stiffness scale factor?
I am simulating the impact of a 6mm - diameter steel solid ball with a rigid falt surface using Ansys-Lsdyna. the speed of the ball at the impact moment is low (from 1 to 10 m/s). specificly, i am intersted in the period between just touching and just leaving the ground for the first impact.