Springback of Copper Alloy Sheets after U-Bending

Abstract:

Springback after U-bending of Cu-Ni-Si alloy sheet and cold-rolled brass sheets (JIS C2600R-H and C2600R-1/4H) was calculated by using FEM. In the simulations, the Yoshida-Uemori kinematic hardening model was employed, by which stress-strain responses under uniaxial tension and cyclic tension-compression loadings are accurately described. The simulation results using Yoshida-Uemori model well predicted the experimentally obtained springback, while the isotropic hardening model underestimated it for every material. From such comparisons between experiment and simulation, it is concluded that the Bauschinger effect as well as the plastic strain dependency on Youngs modulus should be taken into account for an accurate springback simulation.

• Periodical: Applied Mechanics and Materials (Volume 510)
• Pages: 118-122
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.510.118
• Online since: February 2014
• Authors: H. Hamasaki, Yasuhiro Hattori, Kingo Furukawa, Fusahito Yoshida
• Keywords: Copper Alloy, Finite Element (FE) Simulation, Kinematic Hardening, Springback, U-Bending

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