Abstract
During cold forming processes ductile fractures are sometimes encountered, depending on the operating parameters and on the material properties and determining the production of defective components to be discarded; for this reason the development of a general approach for the prediction of this type of defects is particularly suitable and this aim has been pursued by a large number of researchers in the last two decades. In the paper the most important and diffused models are described and analysed in order to outline the advantages offered by each of them. Some applications to typical metal forming processes are presented, carrying out a comparison between the numerical predictions and the experimental verifications.
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References
Dodd, B., Defect in Cold Forging. Final Report the Materials and Defects Sub-group of the International Cold Forging Group, Osaka, 1993.
Gelin, J. C., Predelanu, M., Recent Advances in Damage Mechanics: Modelling and Computational Aspects, Proc. of Numiform ‘82, pp. 89–98, 1992.
Tvergaard, V., Influence of Void Nucleation on Ductile Shear Fracture at a Free Surface, J. Mech. Phys. Solids, vol. 30, no. 6, pp. 339–425, 1982.
Predeleanu, M., Finite Strain Plasticity Analysis of Damage Effects in Metal Forming Processes, Computational Methods for Predicting Material Processing Defects, pp. 295–307, 1987.
Hill, R., A General Theory of Uniqueness and Stability for Inelastic Plastic Solids, J. Mech. Phys. Solids, vol. 6, pp. 236–249, 1958.
Storen, S., Rice, J.R., Localized Necking in Thin Sheets, J. Mech. Phys. Solids, vol. 23, pp. 421–441, 1975.
Barcellona, A., Prediction of Ductile Fracture in Cold Forging Processes by FE Simulations, Proc. of X CAPE, pp., 1994.
Freudenthal, A. M., The Inelastic Behaviour of solids, Wiley, NY, 1950.
Clift, S. E., Hartley, P., Sturgess, C. E. N., Rowe, G. W., Fracture Prediction in Plastic Deformation Processes, Int. J. of Mech. Sci., vol. 32, no. 1, pp. 1–17, 1990.
Oyane, M., Sato, T., Okimoto, K., Shima, S., Criteria for Ductile Fracture and their Applications, J. of Mech. Work Tech., vol. 4, pp. 65–81, 1980.
Alberti, N., Barcellona, A., Masnata, A., Micari, F., Central Bursting Defects in Drawing and Extrusion: Numerical and Ultrasonic Evaluation, Annals of CIRP, Vol.42/1/1993, pp. 269–272.
Cockroft, M. G., Latham, D. J., Ductility and the Workability of Metals, J. Inst. Metals, vol. 96, pp. 33–39, 1968.
Brozzo, P., De Luca, B., Rendina, R., A New Method for the Prediction of Formability Limits in Metal Sheets, Proc. of the 7th Conference of the International Deep Drawing Research Group, 1972.
Ayada, M., Higashimo, T. Mori, K., Central Bursting in Extrusion of Inhomogeneous Materials, Advanced Technology of Plasticity, vol. 1, pp. 553–558, 1987.
McClintock, F., Kaplan, S. M., Berg, C. A., Ductile Fracture by the Hole Growth in Shear Bands, Int. J. of Mech. Sci., vol. 2, p. 614, 1966.
Rice, J., Tracey, D., On Ductile Enlargement of Voids in Triaxial Stress Fields, J. of Mech. Phys. Solids, vol. 17, 1969.
Osakada, K., Mori, K., Kudo, H., Prediction of Ductile Fracture in Cold Forming, Annals of the CIRP, Vol. 27 /1, pp. 135–139, 1978.
Gurson, A. L., Continuum Theory of Ductile Rupture by Void-Nucleation and Growth: Yield Criteria and Flow Rules for Porous Ductile Media, J. of Eng. Mat. Tech., vol. 99, pp. 2–15, 1977.
Tvergaard, V., Ductile Fracture by Cavity Nucleation between larger voids, J. Mech. Phys. Solids, vol. 30, no. 4, pp. 265–286, 1982.
Needleman, A., Tvegaard, V., An Analysis of Ductile Rupture in Notched Bars, J. of Mech. Phys. Solids, vol. 32, No. 6: 461–490, 1984.
Needleman, A., Rice, J.R., in Mechanics of Sheet Metal Forming edited by D.P. Koistinen et al., Plenum Press, New York, p. 237, 1978.
Chu, C.C., Needleman, A., Jnl. Eng. Mat. Tech., vol. 102, pp. 249–262, 1980.
Alberti, N., Barcellona, A., Cannizzaro, L., Micari, F., Predictions of Ductile Fractures in Metal Forming Processes: an Approach Based on the Damage Mechanics, Annals of CIRP, vol. 43 /1, pp. 207–210, 1994.
Alberti, N., Cannizzaro, L., Micari, F., Prediction of Ductile Fractures Occurrence in Metal Forming Processes, Proc. of the II AITEM Conference, pp. 157–165, 1995.
Fratini, L., Micari, F., Lombardo, A., Material characterization for the prediction of ductile fractures occurrence: an inverse approach, accepted for the publication on the Proceedings of the Metal Forming ‘86 Conference.
Shima, S., Oyane, M., Plasticity Theory for Porous Metals, Int. J. of Mech. Sci., vol. 18, pp. 285, 1986.
Kobayashi, S., Oh, S. I., Altan, T., Metal Forming and the Finite Element Method, edited by the Oxford University Press, 1989.
Aravas, N., The Analysis of Void Growth that Leads to Central Bursts during Extrusion, J. of Mech. Phys. Solids, vol. 34, no. 1, pp. 55–79, 1986.
Alberti, N., Borsellino, C., Micari, F., Ruisi, V.F., Central Bursting Defects in the Drawing of Copper Rods: Numerical Predictions and Experimental Tests, Transactions of NAMRI/SME, vol. 23, pp. 85–90, 1995.
Borsellino, C., Micari, F., Ruisi, V.F., The Influence of Friction on Central Bursting in the Drawing Process of Copper Specimens, Proceedings of the International Conference on Advances in Materials and Processing Technologies (AMPT’95), pp. 1230–1239, 1995.
Avitzur, B., Analysis of Central Bursting Defects in Extrusion and Wire Drawing, Trans. ASME, ser. B, vol. 90, pp. 79–91, 1968.
Orbegozo, J. I., Fracture in wire drawing, Annals of CIRP, vol. 16 /1, pp. 319–322, 1968.
Avitzur, B., Choi, C. C., Analysis of Central Bursting Defects in Plane Strain Drawing and Extrusion, Trans. ASME, ser. B, vol. 108, pp. 317–321, 1986.
Moritoki, H., Central Bursting in Drawing and Extrusion under Plane Strain, Advanced Technology of Plasticity, vol.l, pp. 441–446, 1990.
Hingwe, A. K., Greczanik, R. C., Knoerr, M., Prediction of Internal Defects by Finite Elements Analysis, Proc. of the 9th International Cold Forging Congress, pp. 209216, 1995.
Micari, F., Fratini, L., Lo Casto, S., Alberti, N., Prediction of Ductile Fracture Occurrence in Deep Drawing of Square Boxes, accepted for the publication on the Annals of CIRP, vol. 45 /1, 1996.
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Alberti, N., Micari, F. (1996). Forming Processes Design Oriented to Prevent Ductile Fractures. In: Kuljanic, E. (eds) Advanced Manufacturing Systems and Technology. International Centre for Mechanical Sciences, vol 372. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2678-3_5
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DOI: https://doi.org/10.1007/978-3-7091-2678-3_5
Publisher Name: Springer, Vienna
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