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A Multi‐Mechanism Model for Cutting Simulations Combining Visco‐plastic Asymmetry and Phase Transformation
Author(s) -
Cheng Chun,
Mahnken Rolf,
Uhlmann Eckart,
Ivanov Ivan Mitkov
Publication year - 2013
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201310070
Subject(s) - asymmetry , plasticity , softening , materials science , mechanism (biology) , transformation (genetics) , phase (matter) , weighting , thermodynamics , physics , chemistry , composite material , quantum mechanics , acoustics , gene , biochemistry
We develop a multi‐mechanism model for strainrate‐ and temperature‐dependent asymmetric plastic material behavior accompanied by phase transformations, which are important phenomena in steel production processes. To this end the well‐known Johnson‐Cook model is extended by the concept of weighting functions, and it is combined with a model of tranformation‐induced plasticity (TRIP) based on Leblond's approach. The bulk model is formulated within a thermodynamic framework at large strains, and it will be specialized and applied to cutting processes in steel production. In the examples parameters are identified for the material DIN 100Cr6, and we illustrate the characteristic effects of our multimechanism model, such as strain softening due to temperature, rate dependence and temperature dependence as well as the SD‐effect. A finite‐element simulation illustrates the different mechanisms for a cutting process. (© 2013 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)