Ratcheting Simulation of Z2CN18.10 Austenitic Stainless Steel under Pre-Strain Conditions

Abstract:

Uniaxial ratcheting behaviors of Z2CN18.10 austenitic stainless steel under both tensile pre-strain (TP) and compressive pre-strain (CP) were experimentally studied at room temperature. The experimental results show that: TP restrains ratcheting strain accumulation of subsequent cycling with positive mean stress; lower level of CP is found to accelerate ratcheting strain accumulation while higher level of CP retards the accumulation. Based on the Ohno-Wang II kinematic hardening rule, rate-independent model, viscoplastic model, isotropic hardening model and a modified model were constructed to describe the ratcheting behaviors under various pre-strain conditions. All the four models gave fairly good prediction on ratcheting strains for various TP. The isotropic hardening model and modified model predicted acceptable ratcheting strain though still showed slight tendency of over prediction.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 112-116
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.112
• Online since: September 2016
• Authors: Yong Wang, You Gang Peng, Xu Chen*
• Keywords: Constitutive Model, Cyclic Deformation, Pre-Strain, Ratcheting

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