On the Definition of State Variables for an Internal State Variable Constitutive Model Describing Metal Deformation
Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47500 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 ...