EFFECT OF FRICTION COEFFICIENTS AND EXTRAPOLATION LAWS ON SPRINGBACK PREDICTION OF HSLA420 STEEL

Slim Ben-Elechi¹*, Seddik Shiri², Mohamed Guerich³

¹ Laboratory of Mechanical Engineering, National Engineering School of Monastir, University of Monastir, Avenue Ibn Eljazzar, 5019 Monastir, Tunisia
² Laboratory of Applied Mechanical Research and Engineering, University of Tunis El Manar, 1002, Tunis, Tunisia
³ Léonard de Vinci Pôle Universitaire, Research Center, 92916 Paris la Défense Cedex, France
* Corresponding author: slim.benelechi@issig.u-gabes.tn

ABSTRACT: The high strength steels are widely used especially for the metal stamping. This process could have important differences with the desired geometry due to the springback phenomenon. The numerical simulation of the stamping and springback is widely adopted in automotive industry. The accurateness is highly dependent on numerical techniques as well as process parameters. Among the parameters that affect the precision, we can mention: the bending radius-thickness ratio, the friction coeffcients, the yield loci, the finite element formulation, the damage ... In this work, the effects of friction coefficients and the extrapolation laws on springback numerical prediction are investigated. The accuracy of this work is demonstrated through the industrial stamping process of an automotive part with High-Strength low-alloy steel HSLA420. The numerical results are obtained with the Pam-stamp 2G. It was shown that the extrapolations of the laws have the same order of influence as the friction coefficients.

KEYWORDS: Stamping, springback, laws extrapolation, HSLA420

DOI: https://doi.org/10.69076/jomac.2024.0026

CITATION: S. Ben-Elechi, S. Shiri and M. Guerich, EFFECT OF FRICTION COEFFICIENTS AND EXTRAPOLATION LAWS ON SPRINGBACK PREDICTION OF HSLA420 STEEL, International Journal of Mechanics and Control, Vol. 25, No. 02, pp. 39-45, 2024, https://doi.org/10.69076/jomac.2024.0026

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