A model for the torsion strength of a laser-welded stator

• A semi-empirical mathematical model was developed to estimate the feature dimensions of the weld bead at various welding speeds.
• An approximate equation to calculate the weld bead area was derived.
• A torsion strength estimation model was built to describe the quantitative relationship between the torsion strength and the weld bead area.
• The required weld bead area for stator with various specifications was derived from this model.

Torsion strength of the laser-welded stator was modeled in this study to reduce the number of destructive experiments. A semi-empirical mathematical model was developed to estimate the feature dimensions of the weld bead at various welding speeds and an approximate equation to calculate the weld bead area was then derived. A torsion strength estimation model was built to describe the quantitative relationship between the torsion strength and the weld bead area. The feature dimensions, area of the weld bead and the torsion strength of the laser-welded stator were measured in experiments to validate the models. Modeling results fit well with the experimental results. The required weld bead area for the stator with various specifications could be derived from this model.