Memory surfaces separating the processes of monotonous and cyclic loads

The processes of elastoplastic deformation structural materials can consist a sequence monotonous and cyclic loading regimes, in which peculiar effects features arise. Mathematical modeling such processes, as well resource assessment forecasting, is very difficult task. In addition, the analysis transient from to shows need separate these processes. Based on results experimental studies samples stainless steel 12Х18Н10T under rigid (controlled deformation) process, monotonic modes, conditions uniaxial tension-compression at normal temperature, differences are revealed. To describe modes theories plastic flow with combined hardening, various variants memory surfaces introduced. An showed that space strain tensor, size surface determined by range strains, position center values average strains loading. Various considered, their capabilities disadvantages identified, most adequate variant determined. confirm operability this version surface, together equations Bondar plasticity model, calculated were compared reliable agreement was obtained between both terms kinetics stress-strain state number cycles failure.