Determination of Johnson–Cook Constitutive Parameters for Cutting Simulations

The Johnson–Cook constitutive equation is very widely used for simulating cutting processes. Different methods are applied for establishing parameters of the constitutive equation. Based on the methods analysed in this study, two algorithms were worked out to determine the constitutive parameters fo...

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Bibliographic Details
Published in:Metals (Basel ) 2019-04, Vol.9 (4), p.473
Main Authors: Storchak, Rupp, Möhring, Stehle
Format: Article
Language:English
Subjects:
Algorithms
Compression tests
computational constitutive modelling and experimental validation
Constitutive equations
Constitutive relationships
Cutting parameters
cutting simulation
Design of experiments
Johnson–Cook constitutive equation
Machining
Methods
Simulation
Strain hardening
tensile/compression and cutting test
Titanium alloys
Titanium base alloys
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Summary:The Johnson–Cook constitutive equation is very widely used for simulating cutting processes. Different methods are applied for establishing parameters of the constitutive equation. Based on the methods analysed in this study, two algorithms were worked out to determine the constitutive parameters for the prevailing conditions during cutting processes. In the first algorithm, all constitutive parameters were established simultaneously with standardized test methods. In the second algorithm, the constitutive parameters were established separately in accordance with the cutting conditions prevailing in machining processes. The developed methodology was verified with AISI 1045 heat-treatable steel and Ti10V2Fe3Al (Ti-1023) titanium alloy. The two materials were examined in standardized tensile and compression tests with varying strain rates and temperatures. In addition, the kinetic characteristics of the orthogonal cutting process were established. Based on the results obtained by experiment and the algorithms developed, the constitutive parameters for the cutting conditions were calculated. The parameters were used to determine the material model for simulating the orthogonal cutting process. The algorithms developed were verified by comparing the simulated and experimentally determined kinetic cutting characteristics, which confirmed their good quality.
ISSN:2075-4701
2075-4701
DOI:10.3390/met9040473