Journal of Shanghai Jiaotong University ›› 2017, Vol. 51 ›› Issue (8): 1013-1017.doi: 10.16183/j.cnki.jsjtu.2017.08.017

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

 ZHANG Wei1,2,WANG Xiaowei1,2,3,JIANG Yong1,2
HUANG Xin1,2,GONG Jianming1,2,WENG Xiaoxiang1,2   

  1.  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:2017-08-30 Published:2017-08-30
  • Supported by:
     

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

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