Abstract
In this paper, a gradient-driven non-linear optimization algorithm has been introduced and applied in numerically simulation of a nickel-chromium alloy at elevated temperature. The Chaboche unified constitutive model has been used to describe the cyclic plasticity and viscoplasticity of this alloy. Optimisation algorithm has facilitated a step-by-step method to obtain the initial material parameters, while a non-linear least-square approach were used to obtain the optimised material parameters. Uniaxial experiments were carried to obtain the full cyclic stress-strain and stress relaxation data at 450°C. Satisfactory results have been obtained for the simulation of the transient and steady state cyclic stress-strain and stress relaxation behaviour.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
