上海交通大学学报

上海交通大学学报 ›› 2017, Vol. 51 ›› Issue (8): 1013-1017.doi: 10.16183/j.cnki.jsjtu.2017.08.017

• 兵器工业 • 上一篇    下一篇

 基于多损伤参量的P92钢蠕变变形模拟

 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   

  1.  1. 南京工业大学  机械与动力工程学院， 南京 211816；
    2. 江苏省极端承压装备设计与制造重点实验室， 南京 211816；
    3. 比利时根特大学  材料科学与工程学院， 兹维纳尔德 B9052
  • 发布日期:2017-08-30
  • 基金资助:
     

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

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摘要：  在连续损伤力学框架内，采用2种损伤状态变量模型来描述P92钢在650℃下的软化、损伤的起始及扩展机制.在分析连续损伤方程及已有的相关蠕变试验数据的基础上，提出了蠕变连续损伤方程参数的确定方法并得到650℃下P92钢蠕变连续损伤方程.结果表明：通过蠕变试验数据得到的损伤参量确定的蠕变连续损伤方程，可以很好地模拟P92钢在650℃下的蠕变变形，多损伤参量连续损伤方程也可以很好地外推至其他应力水平.基于多损伤参量的连续损伤方程可以从非弹性应变速率、内应力及微观结构的演化行为方面对蠕变变形进行较好地描述，具有工程使用价值.

关键词:  P92钢； 蠕变； 多损伤参量； 变形模拟

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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