topic Autodesk Simulation Mechanical 2014 - Can't solve assembly with surface contact in Simulation Mechanical Forums (Read-Only)

Autodesk Simulation Mechanical 2014 - Can't solve assembly with surface contact

Anonymous — Fri, 31 Jan 2014 10:08:08 GMT

Hey

I have a assembly of a universal joint which I try to simulate in a static situation, and I solve for linear stress. I have some troubles getting some results when I use "surface contact" between my parts (see attached picture, set up). When I push simulate my computer just start solving and solving, but after 15 min. If comes up with some warnings, and after 8 hours it just keep repeating the same warnings. What is wrong? The funny thing is that it takes around 15 min. To solve the same situation just with bonded surfaces. And results looks very realistic

Best regards

Kaare Bek Hansen

Mechanical student at University of Southern Denmark

Re: Autodesk Simulation Mechanical 2014 - Can't solve assembly with surface cont

Stefan2653 — Fri, 31 Jan 2014 16:10:02 GMT

Kaare,

Is the left linkage properly constrained where the shaft would connecto to it? If you don't have a translational constraint in X and Y there, that linkage will just flop around, resulting in the insufficient tie down error. When you bond the assembly, the left linkage is prevented from flopping and the solver will arrive at a solution, even without those translational constraints.

Stefan

Re: Autodesk Simulation Mechanical 2014 - Can't solve assembly with surface cont

Anonymous — Sat, 01 Feb 2014 15:01:54 GMT

Thank you for the advise.