소성∙가공 (Transactions of Materials Processing)

  • 제20권8호
  • /
  • Pages.527-533
  • /
  • 2011
  • /
  • 1225-696X(pISSN)
  • /
  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
권호 표지
DOI QR코드

DOI QR Code

인장-압축 비대칭성을 고려한 AZ31 판재의 항복함수 구성

Construction of Yield Criterion for AZ31 Sheet Alloy by Considering Tension-Compression Asymmetry

  • 윤종헌 (한국기계연구원 부설 재료연구소) ;
  • ;
  • 이정환 (한국기계연구원 부설 재료연구소)
  • 투고 : 2011.07.29
  • 심사 : 2011.11.10
  • 발행 : 2011.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In order to take into account the strong anisotropy and the tension-compression asymmetry of AZ31 sheet alloy, the Cazacu-Plunkett-Barlat yield criterion(Cazacu, 2006), CPB06, was adopted in the present material modeling. The variation of anisotropic coefficients which describe the yield surface evolution of AZ31 is optimized using an interpolation function based on specific calibration results. It generates continuous yield surfaces, which makes it possible to describe the different hardening rates in tension and compression as well as tension-compression asymmetry of magnesium alloys. The ability of the CPB06 yield criterion to predict experimental results was demonstrated and compared with that of the Hill(1948) yield criterion.

키워드

참고문헌

  1. T. Walde, H. Riedel, 2007, Simulation of Earing during Deep Drawing of Magnesium Alloy AZ31, Acta Mater., Vol. 55, No. 3, pp. 867-874. https://doi.org/10.1016/j.actamat.2006.09.007
  2. S. Yi, J. Bohlen, F. Heinemann, D. Letzig, 2010, Mechanical Anisotropy and Deep Drawing Behaviour of AZ31 and ZE10 Magnesium Alloy Sheets, Acta Mater., Vol. 58, No. 2, pp. 592-605. https://doi.org/10.1016/j.actamat.2009.09.038
  3. J. Levesque, K. Inal, K. W. Neale, R. K. Mishra, 2010, Numerical Modeling of Formability of Extruded Magnesium Alloy Tubes, Int. J. Plast., Vol. 26, No. 1, pp. 65-83. https://doi.org/10.1016/j.ijplas.2009.05.001
  4. M. Li, X. Y. Lou, J. H. Kim, R. H. Wagoner, 2010, An Efficient Constitutive Model for Roomtemperature, Low-rate Plasticity of Annealed Mg AZ31B Sheet, Int. J. Plast., Vol. 26, No. 6, pp. 820-858. https://doi.org/10.1016/j.ijplas.2009.11.001
  5. O. Cazacu, B. Plunkett, F. Barlat, 2006, Orthotropic yield Criterion for Hexagonal Closed Packed Metals, Int. J. Plast., Vol. 22, No. 7, pp. 1171-1194. https://doi.org/10.1016/j.ijplas.2005.06.001
  6. S. Erturk, D. Steglich, J. Bohlen, D. Letzig, W. Brocks, 2009, Thermo-mechanical Modelling of Indirect Extrusion Process for Magnesium Alloys, Int. J. Mater. Form., Vol. 2, No. 1, pp. 49-52. https://doi.org/10.1007/s12289-009-0436-6
  7. A. S. Khan, A. Pandey, T. Gnäupel-Herold, R. K. Mishra, 2011, Mechanical Response and Texture Evolution of AZ31 Alloy at Large Strains for Different Strain Rates and Temperatures, Int. J. Plast., Vol. 27, No. 5, pp. 688-706. https://doi.org/10.1016/j.ijplas.2010.08.009
  8. R. Hill, 1948, A Theory of Yielding and Plastic Flow of Anisotropic Metals, Proc. R. Soc. Lond. A, Vol. 193, No. 1033, pp. 281-297. https://doi.org/10.1098/rspa.1948.0045