How to simulate a gripper

[maxroucool]

Hi,

I am trying to simulate in ANSYS Workbench 12 a gripper made in only one piece. It is designed to be in plastic.
I succeed to simulate it alone, but I don't when I try to simulate the gripper grasping something (here a cylinder). The gripper pass through the cylinder, whereas it should adapt itself around it.

The gripper is a part imported from Catia, and the cylinder is just an extrusion in ANSYS.
I set a fixed support in both screw holes of the gripper, and on the lower face of the cylinder. I also impose a displacement at the bottom of the gripper.

Here are 2 screenshots:
The first represents the Displacement and fixed supports:

http://img42.imageshack.us/img42/9782/capturestatic.png

The second represents the problem that I have after deformation:

http://img263.imageshack.us/img263/6234/capturevonmises.png

I really don't know why it doesn't work. If you could help me I would be grateful!


Thx!
Max

 

[maxroucool]

up plz!

 

[rstupplebeen]

Have you defined contact in the model?

Rob Stupplebeen