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http://dx.doi.org/10.5228/KSPP.2005.14.7.601

Prediction of fracture in Hub-hole Expansion Process Using Ductile fracture Criteria  

Ko, Y. K. (한국과학기술원 기계공학과)
Lee, J. S. (한국과학기술원 기계공학과)
Huh, H. (한국과학기술원 기계공학과)
Kim, H. K. (POSCO 기술연구소)
Park, S. H. (POSCO 기술연구소)
Publication Information
Transactions of Materials Processing / v.14, no.7, 2005 , pp. 601-606 More about this Journal
Abstract
A hole expansion process is an important process in producing a hub-hole in a wheel disc of a vehicle. In this process, the main parameter is the formability of a material that is expressed as the hole expansion ratio. In the process, a crack is occurred in the upper edge of a hole as the hole is expanded. Since prediction of the forming limit by hole expansion experiment needs tremendous time and effort, an appropriate fracture criterion has to be developed for finite element analysis to define forming limit of the material. In this paper, the hole expansion process of a hub-hole is studied by finite element analysis with ABAQUS/standard considering several ductile fracture criteria. The fracture mode and hole expansion ratio are compared with respect to the various fracture criteria. These criteria do not predict its fracture mode or hole expansion ratio adequately and show deviation from experimental results of hole expansion. A modified ductile fracture criterion is newly proposed to consider the deformation characteristics of a material accurately in a hole expansion process. A fracture propagation analysis at the hub-hole edge is also performed for high accuracy of prediction using the new fracture criterion proposed.
Keywords
Hole Expansion Process; Ductile Fracture Criterion; Hole Expansion Ratio;
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1 C. T. Wang, G. Kinzel, T. Altan, 1995, Failure and wrinkling criteria and mathematical modeling of shrink and stretch flanging operation in sheet-metal forming, J. Mater. Process. Tech., Vol. 53, pp. 759-780   DOI   ScienceOn
2 H. Takuda, K. Mori, H. Fujimoto, N. Hatta, 1999, Prediction of forming limit in bore-expanding of sheet metals using ductile fracture criterion., J. Mater. Process. Tech., Vol. 92-93, pp. 433-438   DOI   ScienceOn
3 S. E. Clift, P. Hartley, C. E. N. Sturgess, G. W. Rowe, 1990, Fracture prediction in plastic deformation process, Int. J. Mech. Sci., Vol. 32, pp. 1-17   DOI   ScienceOn
4 M. Oyane, T. Sato, K. Okimoto, S. Shima, 1980, Criteria for ductile fracture and their application, J. Mech. Work. Tech., Vol. 4, pp. 65-81   DOI   ScienceOn
5 P. Brozzo, B. DeLuca, R. Rendina, 1972, A new method for the prediction of formability limits in metal sheets, Proceedings of the 7th biennial conference of the international deep drawing research group
6 M. G. Cockcroft, D. J. Latham, 1968, Ductility and workability of metals, J. Inst. Metals, Vol. 96, pp. 33-39
7 J. R. Rice, D. M. Tracey, 1969, On the ductile enlargement of voids in triaxial stress fields, J. Mech, Phys. Solids, Vol. 17, pp. 201-217   DOI   ScienceOn
8 V. E. Saouma, I. J. Zatz, 1984, An automated finite element procedure for fatigue crack propagation analysis, Eng. Fract. Mech., Vol. 20, No.2, pp. 321-333   DOI   ScienceOn
9 D. Brokken, W. A. M. Brekelmans, F. P. T. Baaijens, 1998, Numerical modeling of metal blanking process, J. Mater. Process. Tech., Vol. 83, pp. 192-199   DOI   ScienceOn