Biaxial tensile deformation simulation of 5000 series aluminum alloy sheet using crystal plasticity finite element method based on homogenization method and its experimental validation

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

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Other Title
  • 均質化法に基づく結晶塑性有限要素法による5000系アルミニウム合金板の二軸引張変形解析と実験検証
  • キンシツカホウ ニ モトズク ケッショウ ソセイ ユウゲン ヨウソホウ ニ ヨル 5000ケイ アルミニウム ゴウキンバン ノ ニジク ヒッパリ ヘンケイ カイセキ ト ジッケン ケンショウ

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Abstract

Biaxial tensile deformation behavior of 5000 series aluminum alloy sheet was simulated by using crystal plasticity finite element method based on the mathematical homogenization method. The representative volume element of crystallographic texture in the alloy was constructed using the crystal orientation data measured by electron back scattered diffraction technique. The material parameters used for the work hardening law were identified on the basis of the true stress-true strain curve measured by the uniaxial tensile test. In order to validate the simulated biaxial tensile deformation behavior of the alloy sheet under linear biaxial stress paths, the calculated true stress-true plastic strain curves and contours of equal plastic work in stress space were precisely compared with those obtained by a servo-controlled biaxial tensile testing machine. Although the anisotropic hardening behavior observed by the experiments was not fully reproduced by the present simulation, the simulated stress–strain curve and the evolution of contours of equal plastic work showed good agreement with the experimental result.

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