Abstract
We investigate the possibility of linear elasticity as an infinitesimal theory based on a genuinely linear response function which retains its validity even for finite deformations. Careful consideration of the domain of definition of the stress response function, the definition of linearity and the notion of material frame-indifference leads to our main result that an exact linear constitutive theory for elastic solids is impossible. We then generalize our result to viscoelasticity theory where the stress response is dependent on deformation gradient histories.
Zusammenfassung
Verf. betrachten die Möglichkeit linearer Elastizität als infinitesimale Theorie begründet auf einer echt linearen Reaktionsfunktion die ihre Gültigkeit sogar für endliche Deformationen behält. Genaue Betrachtung des Definitionsbereiches der Spannungsreaktionsfunktion, der Definition von Linearität, und des Objektivitätsbegriffes führen zum Hauptresultat dass eine echt lineare Theorie für elastische Körper unmöglich ist. Das Resultat wird dann auf viskoelastische Theorie verallgemeinert, wobei die Spannungsreaktion von der Vorgeschichte des Deformationsgradienten abhängt.
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Department of Aerospace Engineering and Mechanics
Department of Mathematics
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Fosdick, R.L., Serrin, J. On the impossibility of linear Cauchy and Piola-Kirchhoff constitutive theories for stress in solids. J Elasticity 9, 83–89 (1979). https://doi.org/10.1007/BF00040982
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DOI: https://doi.org/10.1007/BF00040982