Browse > Article
http://dx.doi.org/10.5228/KSTP.2012.21.5.319

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

Kwak, E.J. ((주)솔루션랩)
Kang, G.P. ((주)솔루션랩)
Lee, K. ((주)솔루션랩)
Publication Information
Transactions of Materials Processing / v.21, no.5, 2012 , pp. 319-323 More about this Journal
Abstract
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.
Keywords
Multiple Scale; Finite Element Method; Void Closure; Open Die Forging; Large Ingot;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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.
3 I. J. Choi, H. J. Choi, D. W. Kim, S. Choi, S. J. Lim, 2010, Void Closing Conditions of Large Ingot by Path Schedules, Trans. Mater. Process., Vol.19, No.8, pp.481-485.
4 K.J. Lee, W. B. Bae, J.R. Cho, D. K. Kim, J. T. Kim, 2005, Proc. Kor. Soc. Tech. Plast. Fall Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 406-409.
5 K. J. Lee, W. B. Bae, J. R. Cho, D. K. Kim, Y. D. Kim, FE Analysis for the Prediction of Void Closure on the Free Forming Process of a Large Rotor, Trans. Mater. Process., Vol. 16, No. 2, pp. 126-131.
6 Y. S. Lee, Y. N. Kwon, J. H. Lee, S. W. Lee, N. S. Kim, 2008, Proc. Kor. Soc. Tech. Plast. Spring Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 57-60.
7 S. H. Kim, M. C. Lee, S. M. Jang, J. G. Eom, M. S. Joun, 2010, Comparative Study on Pore Closing in Open Die Forging by Conventional Forging Press and Radial Forging Machine, Trans. Mater. Process., Vol. 19, No. 7, pp.399-404.   DOI
8 M. S. Chun, J. S. Ryu, Y. H. Moon, 2004, FEM Analysis of Void Closure Behavior during Open Die Forging of Rectangular Billets, Trans. Mater. Process., Vol. 13, No. 2, pp. 143-147.
9 K. H. Lee, S. Moorthy, S. Ghosh, 1999, Multiple Scale Computational Modeling for Damage in Composite Materials, Comput. Mathods appl. Mech. Engrg. Vol. 172, No.1-4, pp. 175-201   DOI
10 I. H. Son, K. H. Lee, 2012, Shape Evolution of Pinholes in Bloom with Multi-Scale Finite Element Technique, Adv. Mater. Res., Vol. 445, pp. 45-50   DOI
11 E. J. Kwak, G. P. Kang, K. H. Lee, I. H. Son, 2009, Proc. Kor. Soc. Tech. Plast. Fall Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 169-172.