Simulation of Axi-Symmetrical Forging Process by “Inverse Approach”

Abstract:

The simplified method called Inverse Approach (I.A.) has been developed by Batoz, Guo et al.[1] for the sheet forming modelling. They are less accurate but much faster than classical incremental approaches. The main aim of the present work is to study the feasibility of the I.A. for the axi-symmetric forging process modelling. In contrast to the classical incremental methods, the I.A. exploits the known shape of the final part and executes the calculation from the final part to the initial billet. Two assumptions are used in this study: the assumption of proportional loading for cold forging gives an integrated constitutive law without considering the strain path and the viscoplasticity, the assumption of contact between the part and tools allows to replace the tool actions by nodal forces without contact treatment. The comparison with Abaqus shows that the I.A. can obtain a good strain distribution and it will be a good tool for the preliminary preform design.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 1007-1010
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.1007
• Online since: February 2011
• Authors: Ali Halouani, Yu Ming Li, Boussad Abbès, Y.Q. Guo
• Keywords: Axi-Symmetrical Element, Cold Forging Process, Integrated Constitutive Law, Inverse Approach, Large Strain

References

[1] Guo Y.Q., Batoz J.L., Detraux, J.M., Duroux, P., Finite element procedures for strain estimations of sheet metal forming parts, Int. J. for Num. Methods in Eng., Vol. 30 (1990), pp.1385-1401.

DOI: 10.1002/nme.1620300804

[2] Bohatier C., Chenot, J.L., Finite element formulation for non steady state viscoplastic deformation, Int. J. Meth. Eng., 21 (1985), pp.1697-1708.

DOI: 10.1002/nme.1620210911

[3] Kobayashi S., Oh S.I., Altan T., Metal forming and finite element method, Oxford University Press, (1989).

[4] Zhao G., Wright E., Grandhi R.V., Forging perform design with shape complexity control in simulating backward deformation, Int. J. Mach. Manuf., Vol 35-9 (1995), pp.1225-1239.

DOI: 10.1016/0890-6955(94)00117-3

[5] Fourment L., Chung S.H., Direct and adjoint differentiation methods for shape optimization in non-steady forming application, European Conference on Computational Mechanics, Cracow, (2001).

[6] Gati, W., Guo Y.Q., Naceur H., Batoz J.L., Approche pseudo inverse pour estimation des contraintes dans les pièces embouties axisymétriques, Revue Européenne des Eléments Finis, Vol. 12 (2003), pp.863-886.

DOI: 10.3166/reef.12.863-886

[7] J.L. Batoz, G. Dhatt, Modélisation des structures par éléments fini, Vol. 1, Solides élastiques, Editeur HERMES, Paris, (1990).

DOI: 10.1002/nme.1620372312