Effect of Material Anisotropies of Hot-Rolled High-Strength Steel Sheet on Localized Deformation Behavior in Hole Expansion - Part-II Simulation and Evaluation of Anisotropic Yield Function

Abstract:

In this study, the circular hole expansion process of high-strength steel sheet is numerically simulated using FE analysis with Hill48 quadratic, Gotoh’s fourth order, Yld2000-2d and Yoshida’s sixth order polynomial yield function. The effects of anisotropic yield functions on local reduction of thickness are evaluated. The thickness distribution around the circular hole edge at just before necking depends on the initial hole diameter. When the initial hole diameter is relative large, the simulation results give almost same thickness distribution among different yield functions. While the initial hole is relative small, individual characteristics of yield function becomes clear and the sixth order yield function gives the best prediction.

• Periodical: Key Engineering Materials (Volume 725)
• Pages: 598-603
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.725.598
• Online since: December 2016
• Authors: Kazuo Okamura, Toshiya Suzuki, Yuya Ishimaru, H. Hamasaki, Fusahito Yoshida
• Keywords: Anisotropic Yield Function, High-Strength Steel Sheet, Hole Expansion

References

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