Simulation of Creep Deformation for P92 Steel Based on
 Multiple Damage Parameters

doi:10.16183/j.cnki.jsjtu.2017.08.017

Abstract

Abstract: A twodamage state variable model was used to describe the softening, damage initiation and growth mechanisms of P92 steel at 650℃ under the continuous damage mechanics framework. Based on the analysis of existed creep experimental data and creep model, a methodology was proposed to determine the constitutive constants of P92 steel at 650℃. It was shown that the constitutive constants obtained from analysis of creep experimental data could simulate the creep deformation of P92 steel at 650℃ precisely, and the constitutive equations with multiple damage parameters could be extrapolated to other stress levels. The continuous damage equations based on the multiple damage parameters can give a good description of creep deformation from terms of inelastic strain rate, inner stress and microstructural evolution. Therefore, the study is of profound practical significance in engineering.

Key words: P92 steel; creep; multiple damage parameters; deformation simulation

CLC Number:

TG 142.24

ZHANG Wei1,2,WANG Xiaowei1,2,3,JIANG Yong1,2 HUANG Xin1,2,GONG Jianming1,2,WENG Xiaoxiang1,2. Simulation of Creep Deformation for P92 Steel Based on
Multiple Damage Parameters[J]. Journal of Shanghai Jiao Tong University, 2017, 51(8): 1013-1017.

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