The model of an elastic body S presented in the previous chapter cannot always be used to describe the behavior of a real body in a satisfactory way. In some cases, it can be usefully replaced by a more sophisticated model in which a set of one or more vectors, called directors, are associated with any point of S. We will now list some physical situations in which this model appears to be meaningful.
KeywordsConstitutive Equation Orthogonal Matrix Dissipation Inequality Objectivity Principle Adjoint Vector
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