Pin losing rotation with mesh

[jdemarco]

Has anyone ever had an issue with a pin joint becoming rigid with a change in mesh size?

I am running a mechanical linear study, the model has been solving without issue.  We then mad a change in the movement of the hinge in the cad model, re-imported, and re-meshed the model.  Now it treats the pin joint as a rigid component (no longer allows rotation). I had set the components to part mesh to prevent a change in mesh size, thinking maybe that was causing the issue - but it still occurs.

Any ideas?

Running Simulation Mechanical 2013

[AstroJohnPE]

Hi,

I do not know why it would have started (instead of being present at the beginning), other than that is how computers handle math. If it is not precise, then issues occur. 😞

Open the documentation (Help) and search for "Joint components". The illustration at the bottom of the page mentions about joints locking up, so that is probably the problem.

[jdemarco]

John,

Thank you for the quick reply.  The items are not in surface contact with one another, and this only occurs occasionally.  I was hoping somebody on here had run inot it nd had a 'fix'.  TThe only solution I have found is to delete the joint, add a new one, and re-solve.