## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### Extrude Cutting Material X Boolean

• Fabricio.Urquhart
Subscriber

I am doing my master thesis, that is a steel bolted connection analysis. I am learning a lot here in the community, thank you.

Now, I have a problem with the bolt stress results.

I think that the problem with the bolt, is something in the geometry. Because when I try to apply a boolean with, Head, fastener and wash of the bolt, it does not occure. Maybe something wrong that I am doing extrude a surface, cutting the material. I think this, becasue when I take the direcional deformation in the bolt axis, I see the picture below:

So, there is something wrong with my bolt geometry.

The model is attached.

Thank you one more time!!!

• Aniket
Ansys Employee

Are you looking at the results at true scale? or is it exaggerated scale?

-Aniket

• Fabricio.Urquhart
Subscriber

It is true scale, now the geometry is correct, but i snot converging...

• peteroznewman
Subscriber

Fabricio,

One of the fasteners was mixed in with one of the beams. Here I pulled it out as Part 10.

I haven't run Solve on this, but you can see if it helps.

Regards,

Peter

• Fabricio.Urquhart
Subscriber

Peter,

I don't understand why when I apply boolean in the parts of the bolt, it does not merge the solids. Could you help me with boolean?

• Fabricio.Urquhart
Subscriber

As you see in the picture below, when I apply boolean, only two solids are merged.

Why it happens?

• Fabricio.Urquhart
Subscriber

The problem was, that I had a Slice in the bolt, because this, boolean was not working. Now I took the splice out, and the boolean is ok.

Peter!!!Using boolean in the bolts, I do not have the peak of stress in the bolts, just se the picute below:

• peteroznewman
Subscriber

Fabricio,

You had three bodies in one multibody part and Shared Topology connected the mesh. Why do you need to Boolean these bodies together?

These are well connected meshes.

There is no problem performing a Boolean on those bodies if that is the last operation. However when you have a Share Topo item in the outline, you can't do a Boolean.  In fact, Share Topo is not required to Share Topology. It is an obsolete function.

18.2 archive attached.

• Fabricio.Urquhart
Subscriber

Thank you Peter. How did you get the picture that is in the right?With this picture you can see that the elements are not regular, because this, I think that the peak of stress is appearing.

• peteroznewman
Subscriber

The reason is Average Across Bodies is set to No by default.