Calculus of Variations and Geometric Measure Theory

V. Crismale - G. Lazzaroni - R. Rossi

On the visco-plastic approximation of a rate-independent coupled elastoplastic damage model

created by rossi on 20 Nov 2023
modified by crismale on 14 Dec 2024

[BibTeX]

Published Paper

Inserted: 20 nov 2023
Last Updated: 14 dec 2024

Journal: SIAM J. Math. Anal.
Volume: 56
Number: 6
Pages: 7940-7988
Year: 2024
Doi: 10.1137/23M1620429

ArXiv: 2311.10186v3 PDF

Abstract:

In this paper we study a rate-independent system for the propagation of damage and plasticity. To construct solutions we resort to approximation in terms of viscous evolutions, where viscosity affects both damage and plasticity with the same rate. The main difficulty arises from the fact that the available estimates do not provide sufficient regularity on the limiting evolutions to guarantee that forces and velocities are in a duality pairing, hence we cannot use a chain rule for the driving energy. Nonetheless, via careful techniques we can characterize the limiting rate-independent evolution by means of an energy-dissipation balance, which encodes the onset of viscous effects in the behavior of the system at jumps.