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Berechnung der stabilen zyklischen Spannungsbelastung für Metalle unter mehraxialer Belastung
Author(s) -
Li J.,
Qiu Y.Y.,
Wang H.D.,
Wang Z.X.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201900189
Subject(s) - materials science , hardening (computing) , modulus , plasticity , structural engineering , nonlinear system , strain hardening exponent , stress path , mechanics , composite material , engineering , physics , layer (electronics) , quantum mechanics
A simple plasticity model for modeling the stabilized cyclic stress‐strain responses is developed to consider the effect of non‐proportional additional hardening. In the proposed model, the plastic modulus for uniaxial loading is extended to multiaxial loading by introducing the non‐proportionality factor and the additional hardening coefficient. The two introduced factors take into account the effects of non‐proportional additional hardening, not only on the shape of the loading path, but also on the material and its microstructure. And then, the basic Armstrong‐Frederick nonlinear hardening rule is modified to model the evolution of the back stress. The consistency condition is enforced to obtain the relationship between the back stress and plastic modulus. The proposed model requires only six material constants for estimating the stabilized responses. Comparisons between the test results (30CrNiMo8HH steel, SA 333 Gr.6 steel, and 1 %CrMoV steel) and model predictions show that the proposed model predicts relatively accurate stress responses under both proportional and non‐proportional loading paths.