On the Definition of State Variables for an Internal State Variable Constitutive Model Describing Metal Deformation - Materials Sciences and Applications

MSA > Vol.5 No.8, June 2014

On the Definition of State Variables for an Internal State Variable Constitutive Model Describing Metal Deformation ()

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DOI: 10.4236/msa.2014.58062 4,224 Downloads 7,804 Views Citations

Author(s)

Paul S. Follansbee

Affiliation(s)

Boyer School of Natural Sciences, Mathematics, and Computing, Saint Vincent College, Latrobe, USA.

ABSTRACT

The quest for an internal state variable constitutive model describing metal deformation is reviewed. First, analogy is drawn between a deformation model and the Ideal Gas Law. The use of strain as a variable in deformation models is discussed, and whether strain serves as an internal state variable is considered. A simple experiment that demonstrated path dependence in copper is described. The importance of defining appropriate internal state variables for a constitutive law relates to the ability to accurately model temperature and strain-rate dependencies in deformation simulations.

KEYWORDS

Consitutive Modeling, Internal State Variable, Metal Deformation, Ideal Gas Law, Path Dependence

Share and Cite:

Follansbee, P. (2014) On the Definition of State Variables for an Internal State Variable Constitutive Model Describing Metal Deformation. Materials Sciences and Applications, 5, 603-609. doi: 10.4236/msa.2014.58062.

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