Universiti Teknologi Malaysia Institutional Repository

Evaluation of sensitivity and calibration of the chaboche kinematic hardening model parameters for numerical ratcheting simulation

Moslemi, Navid and Zardian, Mohsen Gol and Ayob, Amran and Redzuan, Norizah and Rhee, Sehun (2019) Evaluation of sensitivity and calibration of the chaboche kinematic hardening model parameters for numerical ratcheting simulation. Applied Sciences (Switzerland)9, 9 (12). p. 578. ISSN 2076-3417

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Official URL: http://dx.doi.org/10.3390/app9122578


Ratcheting failure of materials and structures subjected to low cycle fatigue in the presence of significant mean stress is of great interest to researchers. In this experimental and numerical study, the response of 316L stainless steel samples was observed in symmetric strain control uniaxial test followed by post-stabilized monotonic test, uniaxial and biaxial ratcheting tests, in order to determine the Chaboche model parameters and to evaluate ratcheting prediction using finite element analysis. The critical elastic limit was initially obtained from incremental uniaxial cyclic tests. The Chaboche parameters were subsequently extracted from experimental hysteresis and post-stabilized monotonic stress plastic-strain curves using two optimization technics, namely, the Particle Swarm Optimization (PSO) and Genetic Algorithm (GA). The two optimization methods were compared for efficiency, in terms of time and accuracy. The PSO method presented higher efficient results and was subsequently used to derive the parameters from hysteresis and post-stabilized monotonic curves. Different values (by definition) of elastic limit were also used. The Finite Element commercial software ANSYS was utilized with the Chaboche model to predict the uniaxial and biaxial ratcheting behavior of 316L stainless steel pipe. The comparison between experimental and the numerical simulation demonstrates that adopting post-stabilized monotonic curve rather than hysteresis curve and with accurate elastic limit obtained from incremental loading test improves ratcheting prediction significantly.

Item Type:Article
Uncontrolled Keywords:316L stainless steel, Calibration
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:87705
Deposited By: Widya Wahid
Deposited On:30 Nov 2020 21:09
Last Modified:01 Dec 2020 15:57

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