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Constitutive Modeling for Uniaxial Time-Dependent Ratcheting of SS304 Stainless Steel

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Abstract:

Based on the experimental results of uniaxial time-dependent ratcheting behavior of SS304 stainless steel at room temperature and 973K, three kinds of time-dependent constitutive models were employed to describe such time-dependent ratcheting by using the Ohno-Abdel-Karim kinematic hardening rule, i.e., a unified viscoplastic model, a creep-plasticity superposition model and a creep-viscoplasticity superposition model. The capabilities of such models to describe the time-dependent ratcheting were discussed by comparing with the corresponding experimental results. It is shown that the unified viscoplastic model cannot provide reasonable simulation to the time-dependent ratcheting, especially to those with certain peak/valley stress hold and at 973K; the proposed creep-plasticity superposition model is reasonable when the creep is a dominant factor of the deformation, however, it cannot provide a reasonable description when the creep is weak; the creep-viscoplastic superposition model is reasonable not only at room temperature but also at high temperature.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

817-822

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.817

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Online since:

June 2007

Authors:

Guo Zheng Kang, Qian Hua Kan, Juan Zhang, Yu Jie Liu

Keywords:

Creep, Plasticity, Ratcheting, Time Dependence, Viscoplasticity

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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