Journal
MATHEMATICS AND MECHANICS OF SOLIDS
Volume 26, Issue 10, Pages 1483-1497Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1081286521990418
Keywords
Creep at large strains; spurious hardening; gradient of the elastic strain; weak solutions
Categories
Funding
- Czech Science Foundation [19-04956S]
- Ministry of Education of the Czech Republic [CZ.02.1.01/0.0/0.0/15-003/0000493]
- Austrian Science Fund [F 65, I 2375, P 27052, I 4052, V662]
- Vienna Science and Technology Fund [MA14-009]
- BMBWF through the OeAD-WTZ [CZ04/2019]
- RVO [61388998]
- Austrian Science Fund (FWF) [V662] Funding Source: Austrian Science Fund (FWF)
Ask authors/readers for more resources
In this paper, Maxwellian-type rheological models of inelastic effects at large strains are reexamined in relation to inelastic strain gradient theories. An alternative inelastic model of creep type is proposed to prevent spurious hardening effects under large slips, by introducing higher-order energy contribution from elastic strain and plastic strain rate gradients. The combination of Kelvin-Voigt damping and Maxwellian creep results in a Jeffreys-type rheological model, and weak solutions are proven to exist through a Faedo-Galerkin approximation.
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 a 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. The existence of weak solutions is proved by way of a Faedo-Galerkin approximation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available