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Evaluation of Sensitivity and Calibration of the Chaboche Kinematic Hardening Model Parameters for Numerical Ratcheting Simulation

1
School of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), Skudai 81310, Malaysia
2
Department of Mechanical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133791, Korea
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(12), 2578; https://doi.org/10.3390/app9122578
Received: 11 April 2019 / Revised: 13 June 2019 / Accepted: 18 June 2019 / Published: 25 June 2019
(This article belongs to the Section Mechanical Engineering)
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Abstract

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. View Full-Text
Keywords: 316L stainless steel; ratcheting; calibration; Chaboche model; elastic limit; hysteresis curve; monotonic curve 316L stainless steel; ratcheting; calibration; Chaboche model; elastic limit; hysteresis curve; monotonic curve
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Moslemi, N.; Gol Zardian, M.; Ayob, A.; Redzuan, N.; Rhee, S. Evaluation of Sensitivity and Calibration of the Chaboche Kinematic Hardening Model Parameters for Numerical Ratcheting Simulation. Appl. Sci. 2019, 9, 2578.

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