Influence of material modeling on earing prediction in cup drawing of AA3104 aluminum alloy sheet

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Fukumasu, H.^1 ; Kuwabara, T.^2 ; Takizawa, H.^3

Mitsubishi Aluminum Co., Ltd., 85, Hiramatsu, Susono, Shizuoka

410-1127, Japan^1

Division of Advanced Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-26, Naka-cho, Koganei, Tokyo

184-8588, Japan^2

Mechanical Engineering Dept., Nippon Institute of Technology, 4-1 Gakuendai Miyashiro, Saitama

345-8501, Japan^3

关键词: AA3104 aluminum alloys;    Biaxial tensions;    Cruciform specimens;    Linear stress;    Material modeling;    Tension compression tests;    Weighting coefficient;    Yield function;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032022/pdf
DOI  :  10.1088/1742-6596/734/3/032022

来源: IOP

【 摘 要 】

In-plane biaxial tension and combined tension-compression tests are carried out for AA3104 aluminum alloy sheets. Linear stress paths are applied to cruciform specimens to measure the contours of plastic work in the stress space and the directions of plastic strain rates at each stress path. Coefficients α1- α8and exponent M of the Yld2000-2d yield function are determined to minimize the mean square error of the analytical yield locus from a measured work contour. The values of the weighting coefficients in the evaluation of the error are varied to check the effect of a specific stress state on the earing behavior. The effects of the combinations of the weighting coefficients on the accuracy of earing prediction in the cup drawing process are discussed.