Hi Steven,
That is what I did. I was quite surprised that the solution doesn't settle down until order 3. Hence my question.
Contact force in my model:
Order 1 = 571N
Order 2 = 6296N
Order 3 = 7546N
There is also a mesh refinement dimension to the answer.
I don't know if the 'nature' of the contact also plays a part - cylindrical, flat, conical ...
I also played with the 'check contact force' option but saw no difference.
I was wondering what others' expectations/knowledge was.
I naively thought that as the contacts are springs then this was a force balance whether or not the contact pressure distribution was any good.
Thanks