Klaus Hofwimmer, Dip.Ing., Manager FEMFAT Sales/Support, MAGNA Powertrain
Nirmalkumar Subbaiah, Program Manager - SimLab, Altair Engineering
Typically, in the automotive industry, the numerical fatigue life analysis of seam welds is based on shell models. Determining the local stiffness and the fatigue life of weld details with those models is a challenging task; especially for closely spaced welds as well as for the connection of metal sheets to thick walled or solid components.
Modelling weld details with solid elements allows for a meaningful description with respect to the load path and the stiffness. Applying a relatively coarse mesh for seam welds leads to an advantage for the fatigue assessment process compared to the detailed modelling required for the well-known “notch stress” approach with a reference radius rref = 0,05 mm at the weld’s root and toe.
For industrial applications the approach proposed reduces modelling and computation effort.
The related mesh generation techniques with SimLab and fatigue assessment with FEMFAT are presented. The accuracy of the analyses is shown based on fatigue test results.
Who Should Attend?
Strength and durability analysts who deal with cyclic loaded welded components.
FEMFAT Durability analysis result of a component with solid meshed weld seams