Material modeling and forming simulation of 5182 aluminum alloy sheet using numerical biaxial tensile test based on homogenized crystal plasticity finite element method

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  • Yamanaka Akinori
    Division of Advanced Mechanical Systems Engineering, Institute of Engineering, Tokyo University of Agriculture and Technology
  • Hashimoto Keisuke
    Department of Mechanical Systems Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Kawaguchi Junpei
    Department of Mechanical Systems Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Sakurai Takeo
    Aluminum and Copper Business, KOBE STELL, LTD.
  • Kuwabara Toshihiko
    Division of Advanced Mechanical Systems Engineering, Institute of Engineering, Tokyo University of Agriculture and Technology

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Other Title
  • 均質化結晶塑性有限要素法に基づく数値二軸引張試験を用いた5182アルミニウム合金板の材料モデリングおよび成形シミュレーション
  • キンシツカ ケッショウ ソセイ ユウゲン ヨウソホウ ニ モトズク スウチ ニジク ヒッパリ シケン オ モチイタ 5182 アルミニウム ゴウキンバン ノ ザイリョウ モデリング オヨビ セイケイ シミュレーション
  • Material modelling and forming simulation of 5182 aluminum alloy sheets using numerical biaxial tensile test based on homogenized crystal plasticity finite element method

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This paper proposes a material modeling methodology of sheet metals using a numerical biaxial tensile test based on the crystal plasticity finite element (CPFE) method and the mathematical homogenization method. To demonstrate the feasibility of the proposed methodology, the biaxial tensile deformation behavior of 5182 aluminum alloy sheet was predicted by the numerical biaxial tensile tests of the sheet. The stress–strain curves and the shapes of the contours of plastic work calculated by the numerical biaxial tensile tests were quantitatively verified by the experimental biaxial tensile test using the cruciform specimen. Parameters of the Yld2000-2d yield function were identified using the results of experimental and numerical biaxial tensile tests. For comparison, von Mises's and Hill's yield functions were identified using the experimental data. To elucidate the effects of the yield functions on the accuracy of sheet metal forming simulation, finite element simulations of hydraulic bulge forming were performed using the identified yield functions. The simulation results demonstrated that the forming simulation using the Yld2000-2d yield function identified by the numerical biaxial tensile tests showed better accuracy than that of the Mises's and Hill's yield functions and was comparable to that of the Yld2000-2d yield function calibrated experimentally.

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