The current work is devoted to optimizing the Chaboche kinematic hardening
parameters via an algebraic method based on its integral equations,
which is rarely investigated. An experimental test in strain range of
for
304 stainless steel (304SS) is applied to demonstrate this method. Firstly, the first
quarter tensile part, along with the Osgood–Ramberg equation, is used to estimate
the initial parameters. Then, optimizations are conducted based on the first
quarter tensile part for the first and the 150th cyclic test. Results indicate
that:
the value of initial yielding stress has a significant effect on the simulation.
The optimized initial yielding stress is roughly 181 MPa for 304SS, which
corresponds to the test at strain range of
with a frequency of 0.25 Hz.
The experimental plastic strains in elastic loading/unloading segments
in the proposed method are unreasonable in calculating the stresses and
should be removed before conducting an optimization.
Keywords
Chaboche kinematic hardening, Ramberg–Osgood model,
parameters optimization, integral equations
School of Astronautics
Beihang University (Beijing University of Aeronautics and
Astronautics)
Xueyuan Road 37#, Haidian district, Beijing
Beijing, 100191
China
School of Astronautics
Beihang University (Beijing University of Aeronautics and
Astronautics)
Xueyuan Road 37#, Haidian district, Beijing
Beijing, 100191
China
