Sudden RampUp when I apply a Force but not when I apply Displacement why ?

Yeshwanth_

Hi Everyone,

I'm simulating a model with one Frictionless Contact and another with Frictional Contact where the gap is 84.5mm.

My model is converged, but the behaviour is not proper, there is a sudden ramp-up when I apply a force but not when I apply a displacement.

Can anyone let me know what the issue is and what the contact settings are that I need to consider for the gap of 84.5 mm.

I'm defining a contact not to penetrate when I apply a force.

loistf

Hi.

from my point of view, it is not unexpected to obtain different results from force-controlled models/experiments and displacement-controlled ones, particularly if there are nonlinarities like contacts. But that is just the general case. It's difficult to comment more without knowing more details of your models.

one suggestion i can make is to run your models in nonlinear transient instead of nonlinear static regime. That might help you clarify/investigate if there are issues in your modelling that you're not identifying now.

I hope it helps.