Welding in FEA

[BenderLMK]

I wonder if someone can give me the recommendations to this topic. I'd like to know the way the welding is analyzed in FEA. Please, shear your work experience & observations. What features of FEA exist?

 

[GBor]

What specifically are you looking for? Transient thermal analysis or strength after weld? How to determine failure in the HAZ? You question is pretty broad. Please narrow it down a bit and possibly indicate a software package.

Thanks,
GBor

 

[gwolf2]

You either model your best guess at the weld geometry explicitly and then consider the results very carefully,

or

You take the loads or stresses next to an idealised simple joint where the weld is and consult the industry standard code for welds of that geometry.

I have done both.

 

[GregLocock]

I see LS DYNA now has a spot welder built in. Obviously given the target market that is a good move. I don't know whether it is good enough for fatigue work

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[BenderLMK]

Specifically I'm looking for information about modeling the welding
operations and conformation. Is it possible to detect influence of
welding on structure (failure in the HAZ) and what the precision such
analysis?

 

[BlasMolero]

Hello!,
I know a FEA add-on packaged named FEWeld (

http://www.weavereng.com/feweld/),

a specialized mathematical tool for calculating weld requirements to meet performance criteria from the results of finite element analysis with SHELL parabolic elements, integrated with COSMOS/M GEOSTAR, Ansys and Femap. Pure "delicatessen" for any FEA user involved in Welding design.

The author Mike Weaver has all my consideration, very expert in FE welding & fatigue analysis of joints, one of the best of the world. The FEWeld User Guide is an excellent book for "Weld Modelling Guidelines for FEA", very good indeed.

Best regards,
Blas.

Best regards,
Blas.

 

[GregLocock]

Well ignoring the silly hype, either you model a complex process in infinite detail, or apply rules that have been generated for known cases and have been validated by years of experience.

Either is good. Which you choose is up to you.



Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.