On inelasticity of damaged quasi-rate-independent orthotropic materials

Milan Mićunović^a, Ljudmila Kudrjavceva<sup>b

a</sup> Faculty of Technical Sciences, University of Kragujevac, Kragujevac, Serbia
^b Department of Civil Engineering, State University of Novi Pazar, Novi Pazar, Serbia

Abstract: The paper deals with a body having a random 3D-distribution of two-phase inclusions: spheroidal mutually parallel voids as well as differently oriented reinforcing parallel stiff spheroidal short fibers. By the effective field approach the effective stiffness fourth-order tensor is formulated and found numerically. Simultaneous and sequential embeddings of inclusions are compared. Damage evolution is described by modified Vakulenko's approach to endochronic thermodynamics. A brief account of the problem of effective elastic symmetry is given. The results of the theory are applied to the damage-elasto-viscoplastic strain of reactor stainless steel AISI 316H.

Keywords: anisotropy by damage, Eshelbian implants, Vakulenko's thermodynamic time.

MSC: Primary 74C20, 74E10, 74R20; Secondary 74A15

Received: 07.10.2021
Accepted: 09.11.2021

Language: English

DOI: 10.2298/TAM211007001M