Abstract
Realistic simulation of metal forming processes requires constitutive equations that describe the behavior of a material under varying process conditions. The equations that have hitherto been developed to address this problem are generally too involved and require the determination of many constants. In this paper, a simple approach based on the representative nature of the work hardening rate, which enables the use of an elementary rate equation in such modelling, is introduced. A prediction methodology based on the concept of fading memory is developed and is found to give good predictions in the case of copper. A mechanistic interpretation of the approach is proposed.
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Oruganti, R.K., Rao, K.P. Flow stress modeling for copper under changing process conditions. Metals and Materials 4, 472–476 (1998). https://doi.org/10.1007/BF03187812
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DOI: https://doi.org/10.1007/BF03187812