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Welding simulations

Hello everyone,

I'm am currently working on welding simulations in NX 8.5 (for fatigue analysis).

I would like to know which are the different (and best) ways avaible on NX 8.5 (or NX 10) to perform welding simulations in an assembly, in order to obtain residual stresses around the welding ? Are there specific methods more efficient than others ? Are there some important parameters to consider, or technics to implement in NX 8.5 ?

Thanks for your answer,

Best regards