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

Shin Onoshima, Tetsuo Oya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationTechnology of Plasticity
PublisherTrans Tech Publications Ltd
Pages169-174
Number of pages6
ISBN (Print)9783035713039
DOIs
Publication statusPublished - 2018 Jan 1
Externally publishedYes
Event1st Asia Pacific Symposium on Technology of Plasticity, APSTP 2017 - Taichung, Taiwan, Province of China
Duration: 2017 Nov 222017 Nov 25

Publication series

NameMaterials Science Forum
Volume920 MSF
ISSN (Print)0255-5476

Other

Other1st Asia Pacific Symposium on Technology of Plasticity, APSTP 2017
CountryTaiwan, Province of China
CityTaichung
Period17/11/2217/11/25

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Keywords

  • Finite element method
  • Multiscale model
  • Numerical material testing
  • Slip systems

ASJC Scopus subject areas

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

Cite this

Onoshima, S., & Oya, T. (2018). Comparing two selection laws of active slip systems in finite element polycrystalline model for numerical material testing. In Technology of Plasticity (pp. 169-174). (Materials Science Forum; Vol. 920 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.920.169