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fillet weld solids help desired

Experimenter
Experimenter

Can someone please tell me of an easy way to put a fillet weld around the perimeter of the pink block. I've got a ton of these to do on a large model. These are tet elements.

 

Thanks.

3 REPLIES

Re: fillet weld solids help desired

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Dennis,

In general, seam welds are not modeled for Finite Element Analysis, then the FE model is less stiffer and stress results are more conservative (in the safe side), you will get higher stresses.

In fact, you can add seam welds and mesh with solid elements, of course, but this is not an easy task, basically because modelling with accuracy the "real life" behaviour of weldings is complex. Also, the meshing approach to follow would be different if you simply want to compute stress & displacements of the full structure, or you are interested in fatigue analysis in the seam welds.

 

In the first case you can create the SOLID geometry of the seam welds either in your CAD or in FEMAP and mesh with solid elements and connect with your mesh using GLUE surface-to-surface.

 

But in the case of local Fatigue analysis of the seam welds then you need to have fully mesh continuity (merging nodes) between all components. Then boolean operation between seam welds and parts is required.

 

winLIFE-meshing-approach.png

 

winLIFE-shell-meshing.png

 

winLIFE-Example21.png

 

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: fillet weld solids help desired

Experimenter
Experimenter

I was afraid that that was going to be the answer.  I guess I'd put "let me put a fillet weld between perpendicular solid surfaces using an edge" on my wish list for the next release.

 

Thanks Blas, I appreciate your help.

Re: fillet weld solids help desired

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Dennis,

Please note you can create geometry en FEMAP to recreate seam welds:

 

1.- Geometry created in FEMAP (or imported from any CAD system). I have used "Geometry > Solid > Add" to joint the two solids.

 

weld1.png

 

2.- Result after using command "Geometry > Solid > Chamfer" simply selecting the edges intersection between both components.

 

weld2.png

 

3.- Feel free to mesh:

 

weld3.png

 

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/