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Seam Weld

DesignLife simplifies the process of setting up fatigue analysis of seam welds by intelligently identifying weld lines in an FE model. The Seam Weld option enables the fatigue analysis of seam welded joints including fillet, overlap, and laser welded joints. The method is based on the approach developed by Volvo (see also SAE paper 982311) and validated through years of use on vehicle chassis and body development projects.

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Seam Weld

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  • Uses stresses either from FE models (shell or solid elements) or stresses from grid point forces or displacements at the weld
  • General material data for seam welds for both bending and tension conditions are supplied
  • Appropriate for weld toe, root and throat failures
  • Thick welds can be assessed using the stress integration method outlined in ASME Boiler & Pressure Vessel Code VIII (Division 2) standard
  • Automated method to identify the weld locations from the solid FE model
  • Corrections available for sheet thickness and mean stress effects.
  • Structural stress at the weld toe, the hot-spot stress can be estimated by the extrapolation of the surface stress at points near the weld
  • Supports BS7608 welding standard, together with required material curves