An Engineering Approach to Consider Stress Concentrations in Fatigue Life Predictions on Automotive Body Structures

2022-01-0261

03/29/2022

Features
Event
WCX SAE World Congress Experience
Authors Abstract
Content
This paper describes a new procedure for more accurate durability predictions of stress along edges of automotive body structures. The current elemental stress based CAE procedures 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 on a circular hole representing a notch in a rectangular plate with different element sizes and options. Elemental nodal stress demonstrates an improvement over elemental stress methods by correlating with theoretical notch stress result. The proposed procedure is then studied on multiple examples of experimental cracks and successfully predicts issues where the current elemental stress method does not. In addition, it avoids the iterative mesh refinement associated with the current methods. In summary, the new method based on nodal stress is more accurate, more efficient, and improves the first time through capability for stress calculations on the edges of structural components.
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DOI
https://doi.org/10.4271/2022-01-0261
Pages
7
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 2022-01-0261, 2022, https://doi.org/10.4271/2022-01-0261.
Additional Details
Publisher
Published
Mar 29, 2022
Product Code
2022-01-0261
Content Type
Technical Paper
Language
English