Modeling of Low Cycle Behavior of P92 Steel Based on Cyclic Plasticity Constitutive Equations

Abstract:

Strain controlled uniaxial low cycle fatigue (LCF) tests of P92 steel were conducted at strain amplitudes of 0.4%, 0.6% and 0.8% in fully reversed manner with strain rate of 1.0×10^-3s^-1 at high temperature of 650 °C. Cyclic softening behavior was studied and time-independent cyclic plasticity model was used to represent the cyclic mechanical behavior of this steel. Material parameters were determined step by step at higher strain amplitude of 0.8%, experimental data with lower strain amplitude were used to validate the extrapolation of the model. Comparison of the simulated and experimental results shows that the proposed model can give a reasonable prediction of stress-strain hysteresis loop for P92 steel at high temperature.

• Periodical: Applied Mechanics and Materials (Volume 750)
• Pages: 41-46
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.750.41
• Online since: April 2015
• Authors: Xiao Wei Wang, Jian Ming Gong*, Yong Jiang, Yan Ping Zhao, Ming Hao Yu
• Keywords: Cyclic Softening, Low Cycle Fatigue, P92 Steel, Time-Independent Cyclic Plasticity Model

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