Hi all,
[LIST]
[*] I am trying to model a rotating rubber pad (NBR shore A 80) spinning at 5000 rpm and making contact with Aluminium block.
[*] I fit Monney Rivlin for my model in ABAQUS explicit.
[*] I modeled this circular pad coupled to reference point where I give my loading and other motions.
[*] When the spinning pad comes in contact with this aluminium block it bends and make a contact, but after few steps it relaxes to the initial position and again comes into contact and then relaxes again. This continues as a sinusoidal behavior till the given step time..
[*] Since I am giving loading the reference point and the pad has to move, I cannot arrest that axis to stop it bouncing in that axis.
[*] I have tried giving load both in tabular amplitude and also instantaneously but it doesnt work, still it behaves that way
[*] There is NO convergence problem , but the behaviour of the rubber pad in contact is strange.
Can anybody suggest what can be done to stop this jumping unstable behaviour.?
[/LIST]
It sounds odd since Mooney-Rivlin is a non-linear elastic model. Although I have to admit that I dont quite understand your description.
Can you run the analysis using Abaqus/Standard instead?
-Jorgen