Non-linear Static Analysis - Separation Contacts

[travis.potier]

I have a model I'm trying to run in which I am simulating the setting of a metal-to-metal seal in a tubular connection. Therefore, the deflections and travel of components needs to be large. I'm having issues getting the analysis to detect the contacts (the parts are simply traveling through each other). I'm tried many different techniques with the contact set up (everything from contact stiffness and max allowable penetrations and varying activation distances). I'm wondering if there are some parameters that may be causing me problems. Does anyone have any recommended parameter settings for non-linear static analyses with large interference and displacements?

[Roelof.Feijen]

Hello @travis.potier ,

When it comes to non-linear analysis, there is no one-size-fits-all solution. So without a model it's not so easy to give advice. I understand you have done already a lot with the contact settings. Note that, when you determine the max. activation distance, be aware that contact elements are generated at the start of the analysis. So max. activation distance should be determined from the starting position of your analysis.

A parameter that you could try is SLINESLIDETYPE. When excessive penetration happens change parameter SLINESLIDETYPE to STATIC (default is DYNAMIC).

Hope this helps.