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

DOI: 10.4236/msa.2014.58062   PDF   HTML     3,721 Downloads   6,082 Views   Citations


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.

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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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The authors declare no conflicts of interest.


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