Publications in Scientific Journals:
E. Davoli, T. Roubicek, U. Stefanelli:
"A note about hardening-free viscoelastic models in Maxwellian-type rheologies at large strains";
Mathematics and Mechanics of Solids,
Maxwellian-type rheological models of inelastic eﬀects of creep type at large strains are revisited in relation to inelastic-strain gradient theories. In particular, we observe that a dependence of the stored-energy density on inelastic-strain gradients may lead to spurious hardening eﬀects, preventing the model from accommodating large inelastic slips. The main result of this paper is an alternative inelastic model of creep type, where higher-order energy-contribution is provided by the gradients of the elastic strain and of the plastic strain rate, thus preventing the onset of spurious hardening under large slips. The combination of Kelvin-Voigt damping and Maxwellian creep results in a Jeﬀreys-type rheological model. Existence of weak solutions is proved via a Faedo-Galerkin approximation.
creep at large strains, spurious hardening, gradient of the elastic strain, weak solutions.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.