Springback of Copper Alloy Sheets after U-Bending
Springback of Copper Alloy Sheets after U-Bending
复制标题
铜合金板U型弯后的回弹
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
F. Yoshida
中科院分区：
文献类型：
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作者：
H. Hamasaki;Y. Hattori;K. Furukawa;F. Yoshida
采用有限元法计算了铜镍硅合金薄板和冷轧黄铜薄板（JIS C2600R-H和C2600R-1/4H） u型弯曲后的回弹量。仿真采用吉田-上森运动硬化模型，准确描述了单轴拉伸和循环拉压加载下的应力-应变响应。采用Yoshida-Uemori模型的模拟结果较好地预测了实验得到的回弹，而各向同性硬化模型低估了每种材料的回弹。从实验和模拟的比较中可以得出结论，为了精确的回弹模拟，应考虑包辛格效应以及塑性应变对杨氏模量的依赖。
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.