STUDY ON CREEP PROPERTY OF HIGH PRESSURE PIPE OF THERMAL POWER PLANT IN SERVICE FROM SMALL PUNCH TEST

GENG JinFeng; MA DongFang; XU Liang; WANG YanQing; WU KeHua

doi:10.16579/j.issn.1001.9669.2019.01.027

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STUDY ON CREEP PROPERTY OF HIGH PRESSURE PIPE OF THERMAL POWER PLANT IN SERVICE FROM SMALL PUNCH TEST

更新时间：2022-09-22

- STUDY ON CREEP PROPERTY OF HIGH PRESSURE PIPE OF THERMAL POWER PLANT IN SERVICE FROM SMALL PUNCH TEST
- Journal of Mechanical Strength Vol. 41, Issue 1, Pages: 169-172(2019)
- 作者机构：
  
  1. 国网河南省电力公司电力科学研究院
  2. 河南恩湃高科集团有限公司
  3. 华润电力焦作有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.01.027
  CLC：
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GENG JinFeng, MA DongFang, XU Liang, et al. STUDY ON CREEP PROPERTY OF HIGH PRESSURE PIPE OF THERMAL POWER PLANT IN SERVICE FROM SMALL PUNCH TEST. [J]. 41(1):169-172(2019)
DOI：

GENG JinFeng, MA DongFang, XU Liang, et al. STUDY ON CREEP PROPERTY OF HIGH PRESSURE PIPE OF THERMAL POWER PLANT IN SERVICE FROM SMALL PUNCH TEST. [J]. 41(1):169-172(2019) DOI： 10.16579/j.issn.1001.9669.2019.01.027.

摘要

采用小冲杆蠕变试验技术对某火电机组高压导汽管道开展566℃温度下的蠕变试验,得到了不同应力水平下挠度随时间的变化曲线。为了获得该材料的稳态蠕变特性,采用了Chakrabarty薄膜延伸模型和逆向有限元法对小冲杆蠕变试验结果进行了分析研究,获得了Norton方程中的材料参数A和n。同时对单轴蠕变试验与小冲杆分析试验获得的材料参数进行对比分析,结果表明小冲杆蠕变试验分析结果与单轴蠕变试验结果基本符合,但不同的分析方法获得的结果精度有所不同。

Abstract

The creep test of high pressure steam pipe of a thermal power plant was carried out at 566 degree by using SPT technology. The deflection curve with time under different stress levels was obtained. In order to obtain the steady-state creep characteristics of the material,the Chakrabarty model and inverse finite element method on small punch creep test results were analyzed,obtained the material parameters of A and n in Norton equation. At the same time,the material parameters of uniaxial creep test and small punch test analysis of the comparative analysis results show that the small punch creep test results and uniaxial creep test results are consistent with each other,but different methods of analysis results of different accuracy.

关键词

小冲杆试验蠕变特性Norton方程薄膜延伸模型逆向有限元

Keywords

Small punch testCreep propertyNorton equationMembrane stretch modelInverse finite element analysis

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Key Laboratory of Safety Science of Pressurized System,Ministry Education,School of Mechanical and Power Engineering,East China University of Science and Technology

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