A method of metal flow, load and strain prediction in forming operations is presented. Based on the upper-bound elemental technique, it is applied to hot forging operations where a constant flow stress can be assumed and also to cold working of aluminium and steel where the effects of strain hardening are taken into account. The predictions were found to be in reasonable agreement with experimental results.
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References
1.
SiebelE.Die Formgeburg in Bildsamen, Zustande Verlag, Stahleisen, Dusseldorf, 1932.
2.
Drop Forging Research Assoc.Load and energy estimation and measurement during drop forging. Report RC/74/130 1974.
3.
HillR.A comparative study of some variational principles in the theory of plasticity. J. App. Mech., Trans. ASME1950, 17, 64.
4.
HillR.A variational principle of maximum plastic work in classical plasticity. Q. Jl. Mech. Appl. Math.1948, 1, 18.
5.
JohnsonW.Estimation of upper-bound loads for extrusion and coining processes. Proc. Instn. Mech. Engrs.1959, 173, 61.
6.
MacdermottR. P.BramleyA. N.An elemental upper-bound technique for general use in forging analysis. Proc. 15 MTDR Conf., 1974.
7.
CramphornA. S.BramleyA. N.Computer aided forging design with UBET. Proc. 18 MTDR Conf., 1977.
8.
BramleyA. N.AbdulN. A.Stress-strain curves from the ring test. Proc. 15 MTDR Conf., 1974.
