navigator30
Mechanical
- May 1, 2006
- 24
Hi guys,
I've read already quite a lot on how to avoid Negative Eigenvalues in contact problems and tried to consider all the advices in my simulation but this problem still occurs.
What I do is put a normal load on one piece in one step and then apply a traction load. The eigenvalue - problem occurs in the traction step.
At the beginning of the calculation I put:
Adjust=tolerance=0, analysis = discontinuous
apply a displacement to put the parts together,
in the normal od step I remove the displacement an put the normal load.
So why is there still an eigenvalue problem, is there anything else I can do?
Thanx for help!
I've read already quite a lot on how to avoid Negative Eigenvalues in contact problems and tried to consider all the advices in my simulation but this problem still occurs.
What I do is put a normal load on one piece in one step and then apply a traction load. The eigenvalue - problem occurs in the traction step.
At the beginning of the calculation I put:
Adjust=tolerance=0, analysis = discontinuous
apply a displacement to put the parts together,
in the normal od step I remove the displacement an put the normal load.
So why is there still an eigenvalue problem, is there anything else I can do?
Thanx for help!