That works when the load is in one direction only, but doubles the work when the load reverses.
Exactly. That is what I was thinking. I mean even when the parts touch each other and there is no gap between the parts, then it is just gonna work in the direction of contact stiffness, without giving any Rigid Body motion errors or convergence problems. What if the load is in the other direction, and the contact stiffness in that direction is zero. Then it may straight away give a Rigid Body motion error, or cause covergence problems. I guess the Contact Stabilization Damping automatically deals with that. Thats a great service provided by ANSYS, and I appreciate that.
And thankyou for inserting a comprehesive example here, was helpful sir.
If the contact result is supposed to be a uniform pressure, the nodal forces are going to oscillate if you have quadratic elements.
Does this mean that faces coming into contact with each other will have variable stress along the face, and not a constant value of stress?