Stamping Springback Simulation of DP980 High-strength Steel Sheet Considering Anisotropic Yield Elastoplasticity

JIN Dingshuainan; HUANG Wenxiong; HUANG Dan

doi:10.3969/j.issn.1674-6457.2026.03.008

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (3) : 74-81. DOI: 10.3969/j.issn.1674-6457.2026.03.008

Iron and Steel Forming

Stamping Springback Simulation of DP980 High-strength Steel Sheet Considering Anisotropic Yield Elastoplasticity

JIN Dingshuainan, HUANG Wenxiong, HUANG Dan^*

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Abstract

Since the traditional constitutive model is difficult to accurately predict the springback effect during the cold forming process of high-strength steel, the work aims to study a new constitutive model considering anisotropy to improve the prediction accuracy of springback of high-strength steel parts. Due to the significant anisotropic behavior of DP980 high-strength steel sheets, anisotropic elastoplastic constitutive models were developed based on the Hill48, Yld2000-2d and Yld2004-18p anisotropic yield criterion, combined with the Yoshida-Uemori (Y-U) hardening model. A finite element model for the stamping springback of U-shaped sheet metal was developed through ABAQUS, the effect of different constitutive models on the springback prediction of DP980 high-strength steel was analyzed and compared with experimental data. The Yld2004-18p 3D stress anisotropic yield criterion demonstrated higher prediction accuracy for DP980 high-strength steel springback compared to the Hill48, Yld2000-2d and Mises criterion, with predicted profiles showing the closest agreement with experiments. The Y-U hardening model incorporating elastic modulus degradation, combined with the Yld2004-18p yield criterion, achieved minimal prediction errors of only 1.62%, 1.2%, and 2.18% for springback angles θ₁, θ₂, and sidewall curvature radius ρ, representing the highest prediction accuracy. This study validates the applicability of the developed anisotropic elastoplastic constitutive models in springback simulations for DP980 high-strength steel sheets. The models significantly improve springback prediction accuracy for high-strength steels.

Key words

high-strength steel sheet / stamping springback / anisotropy / constitutive model / finite element simulation

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JIN Dingshuainan, HUANG Wenxiong, HUANG Dan. Stamping Springback Simulation of DP980 High-strength Steel Sheet Considering Anisotropic Yield Elastoplasticity[J]. Journal of Netshape Forming Engineering. 2026, 18(3): 74-81 https://doi.org/10.3969/j.issn.1674-6457.2026.03.008

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