Insert spring connection

[gtsolid]

Good morning to everyone.
In my Ansys workbench project i have a pads with a known stiffness and i wish to use a spring connection insted of the classic bond connection.
Do you have any reference in order to do this?
I think i have to select the 2 surfaces and then add the stiffness i need in [n/µm] or similar

 

[Erik Panos Kostson]

You can do that. It is a connection, insert spring. So go to Geometry on the outline, right click on the mouse and insert a connection. Then choose connection, right click again, go to insert, and choose Spring.

This link shows how to do this:Link

 

[gtsolid]

The difference is that my 2 bodyes are in contact.
I wish to add this stiffness between a pad and the body it carries

i set a spring between 2 face in contact but i receive error of magnitude:

 

[Erik Panos Kostson]

If you put in a longitudinal (long.) spring between two bodies, you only have stiffness in that spring direction (long.). You will get thus a singularity in the other directions (perpendicular to the spring long. direction). One thus need to apply appropriate boundary conditions so that this body that is not fixed, will not "fly" away (hence the message of large displacement magnitudes) in these directions.

 

[gtsolid]

What about using "Elastic support"? in this case i used a good approximation of FOundation stiffness (object stiffness / contact area) but the results are still over the magnitude

 

[Erik Panos Kostson]

If you change the spring to bonded, and it works then you know it is the rigid body motion as I explained above due to the long. spring, and you need to restrain the model appropriately. That is it. I will leave that to you, that is it for me. good luck.

 

[gtsolid]

I succeed. The behavior is acceptable and also the magnitude.
I need to add a Displacement to a full constrain of the body. That was a sub-assembly of test.
In the final assembly i added the same Supports but i obtain a whole red body as result with more than 5000mm of displacement.
Why i don't receive the magnitude error as in the previous case? The body seems constrained successfully