F function with NSLA

[seseb]

Hello,

I would like to do a 2D structural simulation with 2 areas (an annulus and a circle inside the annulus). Then I applied a contact "surface to surface" and I would like to load the inner cylinder to know the pressure contact.

The problem is when I load with displacement it works, but when I load with force, the model never converged and I don't understand why.

The command for displacement load is simply: DA,2,UY,5E-6

The command for force is:
ALLSEL
ASEL,S,AREA,,2,,,1
NSLA,R,1
F,ALL,FY,100
ALLSEL

Someone can help me?
Thanks

 

[Stringmaker]

Sounds to me like something isn't constrained properly and you're getting rigid body motion...

This is something you're going to have to post a picture of if you want any real help with it.

 

[seseb]

Perfect,

I checked again my boundary conditions and it was right that I missed one (UX = 0 for area 2).
I thought that the problem came from NSLA or F functions, not from BC.

Tank you very much