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Effect of Steel Strengthening Mechanisms on Dent Resistance of Automotive Body Panels
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English
Abstract
The dent resistance of a panel is an important consideration when selecting a type of steel for manufacturing. Yield strength, thickness of the formed part, and stiffness (related to curvature) of the panel each contribute to the overall denting behavior. This study examines the dent resistance of several grades of steel; the objective is to determine if a fundamental difference in denting behavior exists between bake hardenable and non-bake hardenable grades after normalizing with respect to yield strength and thickness in the panel. Several key parameters that may contribute to the denting process are examined, including effects of yield strength, strain aging, work hardening, and stiffness. In addition, an apparent strain-path dependence of yield point return has been observed in bake hardenable steels; the effect of this on dent resistance has yet to be determined.
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Authors
Citation
McCormick, M., Fekete, J., Meuleman, D., and Shi, M., "Effect of Steel Strengthening Mechanisms on Dent Resistance of Automotive Body Panels," SAE Technical Paper 980960, 1998, https://doi.org/10.4271/980960.Also In
Steel Sheet and Steel Bar Products and Processing for Automotive Applications
Number: SP-1349; Published: 1998-02-13
Number: SP-1349; Published: 1998-02-13
References
- Dicello J.A. George R.A. “Design Criteria For the Dent Resistance of Auto Body Panels” SAE Technical Paper No. 740081 1974
- Yutori Y. Nomura S. Kokubo I. Ishigaki H. “Studies on the Static Dent Resistance” Proceedings of 11th IDDRG, Les Momoiries Scientifiques Revue Metallurgie 561 569 1980
- Auto/Steel Partnership (A/SP) Dent Resistance Task Force Internal Report 1996
- DiCostanzo G. P. Matlock D. K. “Effect of Tensile Properties on Dent Resistance of Sheet Steels” SAE Paper No. 960024 1996
- Shi M.F. Brindza J.A. Michel P.F. “Static and Dynamic Dent Resistance Performance of Automotive Steel Body Panels” SAE Paper No. 970158 1997