Learning Forum

[navidMnzh]

Hi! I'm a ansys workbench newbie and I'm trying to simulate a sphere with a specific temperature in some enviroment.

I'm supposed to find the stresses caused by temperature difference in the system.

for that, I want to apply a Fixed Support to the central point of the system, the center of the sphere.

How am I supposed to do that? I searched a lot, and I tried to select the center using the point selection option, but no center is found at all.

Any help is appreciated!

[peteroznewman]

Use a Remote Displacement on the surface of the sphere. You must set the Behavior to Deformable. Set all six DOF to 0.

[navidMnzh]

Thanks for your help!

[navidMnzh]

and another question, with this remote displacement, how are we going to evaluate the displacement of nodes on sphere surface? according to the concept that we have applied all DOFs as 0?
So the nodes won't move at all in this situation.

[peteroznewman]

The nodes will freely expand because a Deformable Remote Displacement scoped to the surface is an element that takes the average of all the surface nodes and creates a new point at the center. You tell it to hold this center point in all DOF at 0. The element adds no stiffness to the model.
Insert a Deformation plot into the Solution branch in Mechanical and you will see the displacement. You might want to create a spherical coordinate system so you can plot the radial component of deformation.