Contact Problem

[PQF]

I'm trying to model the clash between a rigid body and a deformable one, but the rigid body actually penetrates fully in the deformable causing the stress values to go to wcompletely wrong values. Can anyone give me an idea, how to simulate a contact between any impactor ( rigid body ) and a deformable body ?

 

[bassmanjax]

I've had a quick look, here are some suggestions;

- You need to set NLGEOM on in the *STEP card if you want to see any geometric non-linearities.
- Both bodies are meshed with deformable brick elements. You would be better looking at using either analytical rigid surfaces, or rigid elements. I susopect that you may have to use rigid elements for this case.

Regards

Martin Stokes CEng MIMechE

 

[corus]

I ran the input deck and got zero stress. I'm not sure how it managed to run though as you apply a displacement to only one node on a body, while it is free to rotate and free to translate in the other 2 directions. In the displaced shape you can see that the non-encastred body simply rotates about the fixed node. You need to add other restraints to define the problem properly. NLGEOM might give you a mroe complete solution, but I think in this case it won't help much.

corus