Comparing two selection laws of active slip systems in finite element polycrystalline model for numerical material testing

Shin Onoshima, Tetsuo Oya

研究成果: Conference contribution

抜粋

To meet the demand for high accuracy in metal forming simulation including difficult problems such as anisotropy, many material models have been developed. Since the recent material models usually possess many parameters and require cumbersome experiments, a reliable numerical material testing would be helpful to reduce the number of experiments. Therefore, we have engaged in development of a numerical material testing based on the finite element polycrystalline model in which the successive integration method is used for modeling slip systems. However, implementation based on the strain-rate dependent model, which is considered as the mainstream of such model, has not been rigorously considered in our research. In this study, two polycrystalline models were compared to establish better microstructural modeling for constructing a scheme of numerical material testing to predict material behavior that is not obtained by experiments. Numerical rolling, uniaxial tensile tests were conducted on aluminum alloy sheet with the strain-rate dependent model and the successive integration method. The crystal orientation calculated by the successive integration method exhibited close agreement with the experimental value of the rolled aluminum alloy sheet. On the other hand, the calculated crystal orientation by the strain-rate dependent model exhibited less close agreement with the experimental value of the same material than the successive integration method. To ascertain the characteristics of each model in terms of slip deformation quantitatively, the other tensile tests were conducted to calculate Lankford values caused by crystal orientation. Lankford values, calculated by the successive integration method, exhibited better agreement with experimental values than the strain-rate dependent model. These comparisons indicate that the successive integration method represented slip deformation more physically valid than the strain-rate dependent model and resulted in better calculation.

元の言語English
ホスト出版物のタイトルTechnology of Plasticity
編集者Gou-Jen Wang, Kuang-Jau Fann, Yeong-Maw Hwang, Cho-Pei Jiang
出版者Trans Tech Publications Ltd
ページ169-174
ページ数6
ISBN(印刷物)9783035713039
DOI
出版物ステータスPublished - 2018 1 1
外部発表Yes
イベント1st Asia Pacific Symposium on Technology of Plasticity, APSTP 2017 - Taichung, Taiwan, Province of China
継続期間: 2017 11 222017 11 25

出版物シリーズ

名前Materials Science Forum
920 MSF
ISSN(印刷物)0255-5476
ISSN(電子版)1662-9752

Other

Other1st Asia Pacific Symposium on Technology of Plasticity, APSTP 2017
Taiwan, Province of China
Taichung
期間17/11/2217/11/25

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • これを引用

    Onoshima, S., & Oya, T. (2018). Comparing two selection laws of active slip systems in finite element polycrystalline model for numerical material testing. : G-J. Wang, K-J. Fann, Y-M. Hwang, & C-P. Jiang (版), Technology of Plasticity (pp. 169-174). (Materials Science Forum; 巻数 920 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.920.169