Weld Suppression?

[jtillery]

I'm having some difficulty with Creo Simulation 2.0 using perimeter welds. For model that I have created a perimeter weld feature, every time I start the simulation the weld that I have created and the contact interface that I have also created are suppressed.

Is there a way to make the application accept this joining condition?

Is there a proper way to make the perimeter weld work?

Should I not use the contact interface and the weld feature together?

I would greatly appreciate any help with my issue and/or any tips.

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[346gnu]

John,

Can you give a bit more detail with respect to how the contact and the perimeter weld cooperate?

General comments -

Perimeter welds - doublers; usually

Only shells

Contacts don't work with shells (hence suppression)

Space between is 'air'

Doublers add an 'indicative stiffness'; stresses are not trustworthy.

Next bunch of questions would include:

Why do you need the perimeter weld?

What do you want to find out?

As Steven suggests, any pictures/models?

[jtillery]

Charles,

When I run the model with both the contact and weld unsuppressed, I get a warning that informs me that the they have become suppressed, though the results show something different.

Upon running a another design iteration, both have, in fact, been suppressed.

So you can not use the perimeter weld at all on 3D assemblies?

I need the perimeter weld to join the pieces together, in order to avoid the surfaces from being bonded, which would give me an unrealistic results.

[346gnu · Accepted solution]

John,

end, spot, perimeter and weld features are shells only.

Shells can be in 3-d assemblies.

Welds do not work with solids

You need another method.

Create a surface region on the side of your doubler that is in 'contact'

The surface region defines a border that will become bonded.

Parts that touch are assumed bonded.

Create a free/contact between the surface region and the mating part leaving the border bonded.

All will be solids

atb

Charles

[jtillery]

Steven,

The contact is is between two surfaces have a perimeter weld around the border.

(I apologize for the terrible picture.)

[danderson]

Hi John,

Have you tried adding a surface region to both parts that your are assigning the contact region too to set the boundary for the weld penetration?

Thanks,

Don Anderson

[jtillery]

Don,

Is that not what Charles was suggesting?

---------------

Creating a surface region does work. Now I can create the appropriate contact and bonded interfaces.

Thanks Charles and Don.

[danderson]

Yes, what John said, his post was not showing when I replied.