Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2017 , Vol. 51 >Issue 8: 1013 - 1017

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2017.08.017

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

  • 张威1 ,
  • 2，王小威1 ,
  • 2 ,
  • 3，姜勇1 ,
  • 2，黄鑫1 ,
  • 2，巩建鸣1 ,
  • 2，翁晓祥1 ,
  • 2
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  •  1. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China;
    2. Jiangsu Key Lab of Design and Manufacture of Extreme Pressure Equipment, Nanjing 211816, China;
    3. Department of Materials Science and Engineering, Ghent University, B9052 Zwijnaarde, Belgium

Online published: 2017-08-30

Supported by

 

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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

Cite this article

张威1 , 2，王小威1 , 2 , 3，姜勇1 , 2，黄鑫1 , 2，巩建鸣1 , 2，翁晓祥1 , 2 .  Simulation of Creep Deformation for P92 Steel Based on
 Multiple Damage Parameters[J]. Journal of Shanghai Jiaotong University, 2017 , 51(8) : 1013 -1017 . DOI: 10.16183/j.cnki.jsjtu.2017.08.017

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