Influence of Material and Tribological Modelling on the Prediction of Big Size Automotive Components Springback

Abstract:

The finite element simulation has become an essential tool for the proper design of big size automotive components stamping tooling and their process optimization. Although big improvements have been made in the last years in terms of material and tribological modelling, the accuracy of the current models should be further improved to estimate the final post-forming springback of these components, in both AHSS and mild steels.In the present paper the forming of a B-Pillar reinforcement is numerically analyzed using a DX54D mild steel and a TRIP800 high strength steel. In the first part, the influence of the elastic behavior including variable young modulus, the yield criteria and the hardening law on the final springback is studied for both materials. Secondly, the friction coefficient is defined constant and pressure dependent and springback variation is analyzed in function of this variable.In order to stablish the material and friction variables and their typical deviation, results obtained from material characterization and strip drawing tests are used.

• Periodical: Key Engineering Materials (Volume 716)
• Pages: 713-718
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.716.713
• Online since: October 2016
• Authors: Imanol Gil*, Endika Mugarra, Julen Agirre, Joseba Mendiguren, Eneko Sáenz de Argandoña, Lander Galdos
• Keywords: Deep Drawing, Finite Element Method (FEM), Influencing Variables, Springback

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