소성∙가공 (Transactions of Materials Processing)

  • 제21권5호
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  • Pages.319-323
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  • 2012
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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자유단조 공정 시 내부 기공 거동 예측을 위한 멀티스케일 유한요소해석 연구

A Study of Multiple Scale FEM Modeling for Prediction of Inner Void Closing Behavior in Open Die Forging Process

  • 투고 : 2012.06.13
  • 심사 : 2012.07.05
  • 발행 : 2012.08.01
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초록

In order to predict the internal void closing behavior in open die forging process, multiple scale modeling has been developed and applied. The huge size difference between ingot and inner void makes it almost impossible to simultaneously model the actual loading conditions and the void shape. Multiple scale modeling is designed to integrate macro- and micro- models effectively and efficiently. The void closing behavior was simulated at 39 different locations in a large ingot during upsetting and cogging. The correlation between the closing behavior and variables such as effective plastic strain and maximum compressive strain was studied in order to find an efficient measure for predicting the soundness of the forging.

키워드

참고문헌

  1. I. J. Choi, H. J. Choi, H. J. Park, S. Choi, T. W. Jung, D. K. Park, S. K. Choi, S. J. Lim, 2009, An Experimental Study on Void Closure Behavior with Respect to Reductions in Height, Proc. Kor. Soc. Tech. Plast. Spring Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 114-117.
  2. M. C. Song, I. K. Kwon, Y. G. Park, 2007, A study on the Parameters Determining the Void Crushing Ratio in the Cogging Process of Large Forged Products, Trans. Mater. Process., Vol.16, No.7, pp.504-508.
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피인용 문헌

  1. Forging of 1.9wt%C Ultrahigh Carbon Workroll : Part II - Void Closure and Diffusion Bonding vol.22, pp.8, 2013, https://doi.org/10.5228/KSTP.2013.22.8.463
  2. Forging of 1.9wt%C Ultrahigh Carbon Workroll : Part I - Analysis on Void Formation and Microstructure vol.22, pp.8, 2013, https://doi.org/10.5228/KSTP.2013.22.8.456
  3. Process Design for Manufacturing 1.5wt%C Ultrahigh Carbon Workroll: Void Closure Behavior and Bonding Strength vol.22, pp.5, 2013, https://doi.org/10.5228/KSTP.2013.22.5.269