PSI - Issue 75

Jörg Baumgartner et al. / Procedia Structural Integrity 75 (2025) 538–545 Jo¨rg Baumgartner / Structural Integrity Procedia 00 (2025) 000–000

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Fig. 6. Comparison of tangential position prediction ML to 3D FE model)

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Fig. 7. Comparison of vertical position prediction ML to 3D FE model

• Since local stresses are derived, multiaxial stress states can be considered in the assessment. Even though currently only the maximum principal stress has been evaluated, a reliable prediction of stresses normal to the weld and shear stresses is also expected. • Using predicted notch stresses for the assessment removes the necessity to di ff erentiate between two failure modes: cracks through the spot weld and cracks through the sheet, as required for fatigue analysis using FES POW. In this work, only the maximum principal stresses are evaluated. In order to assess a complex load-time or stress time history under variable amplitude loading, the sign of the local notch stress is relevant for identifying and evaluat-