Inventor Weld Analysis

[balajig8]

Hi guys,

I am a student in TU-Munich.

I have tested the weldament option in Inventor and i am little confused with the Contact options.

So basically,

1.I created a small assembly and looked into the stress and deflection.

2.compared it without weld assembly.

please have a look at the document attached and please comment your ideas/views.

I have given a small gap(0.5mm) between the two parts.

I did not use the weldamane option in my cases.I constructed manually by extrude command.

Thanks

Balaji

[salariua]

Sometimes I derive the whole assembly and add fillets to simulate welds (the welds are never straight anyway so fillet would do). You then run the FEA on a part rather than an assembly.

In the simulation window what value are you having on the Contacts-Tolerance ?

[laptop_geek]

What are you hoping to gain from this study? If you're looking to design/analyze the weld then simple hand calcs to check for horizontal shear would be the simplest and easiest way to get a good answer. If you are trying to prove or test something you have some modeling errors that will lead to incorrect results.

As far as the contacts go: I normally use a bonded contact between the parts and the weld, then I'll use a surface contact between the two surfaces of the parts that I want to touch but not penetrate (this would apply between teh rectangular bar and the elliptical tube). If I don't care about the parts penetrating I will use a "Free" contact to keep the solve time short. This is all coming from Simulation Mechanical and I'm not sure if inventor has the surface contact available.

I hope this has helped, if not please give us some more information about what you're trying to do so we can help more.