An Engineering Approach to Consider Stress Concentrations in Fatigue Life Predictions on Automotive Body Structures
2022-01-0301
03/29/2022
- Event
- Content
- This paper proposes a new procedure for more accurate durability predictions on the edges of structural components especially on notch regions. Current CAE procedures based on elemental stress often require iterative mesh refinement to correlate predictions to experimental cracking on the edges of components. The new proposed procedure is based on element nodal stress. It is first studied theoretically on a rectangular plate with different element sizes and options and demonstrates an improvement over elemental stress methods. It is then studied on multiple examples of experimental cracks and successfully predicts issues where current elemental stress methods do not. In addition, it avoids the iterative mesh refinement associated with current methods. In summary, the new method based on nodal stress is more accurate, more efficient, and improves first time through capability on the edges of structural components.
- Citation
- Zhang, W., Pankaj, A., Archak, V., and Guo, M., "An Engineering Approach to Consider Stress Concentrations in Fatigue Life Predictions on Automotive Body Structures ," SAE Technical Paper 2022-01-0301, 2022, .