MAGNETICMEMORY TESTING OF METAL PIPE CRACK

LIU Jun; HUANG Chen; CHENG Shaowei; HE Xing

doi:10.16579/j.issn.1001.9669.2015.01.015

您当前的位置：

首页 >

文章列表页 >

MAGNETICMEMORY TESTING OF METAL PIPE CRACK

更新时间：2022-09-22

- MAGNETICMEMORY TESTING OF METAL PIPE CRACK
- Journal of Mechanical Strength Vol. 37, Issue 1, Pages: 160-165(2015)
- 作者机构：
  
  1. 西南石油大学土木工程与建筑学院
  2. 西南石油大学油气装备现代设计与仿真实验室
  3. 四川石油管理局安全环保质量监督检测研究院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2015.01.015
  CLC：
扫描看全文
LIU Jun, HUANG Chen, CHENG Shaowei, et al. MAGNETICMEMORY TESTING OF METAL PIPE CRACK. [J]. 37(1):160-165(2015)
DOI：

LIU Jun, HUANG Chen, CHENG Shaowei, et al. MAGNETICMEMORY TESTING OF METAL PIPE CRACK. [J]. 37(1):160-165(2015) DOI： 10.16579/j.issn.1001.9669.2015.01.015.

摘要

提出采用裂纹区的应力场和应力-磁场理论来解释磁记忆检测原理,并通过采用磁偶极子模型来实现裂纹长度的定量化研究;对各种不同管道裂纹进行磁记忆检测,再对其磁记忆信号特征进行分析、研究。检测分析结果表明:裂纹尖端处应力集中且磁场出现最大值,磁场强度的法向分量也达最大值;而在裂纹中部附近,磁场强度的切向分量出现最大值,法向分量具有过零点特征。裂纹长度与磁记忆切向分量信号梯度峰值之间的距离和法向分量信号的波峰和波谷之间的距离近似成正比例关系。根据这一现象,给出了一个具有较好计算精度的确定裂纹长度的计算表达式,并用实验结果进行了验证。

Abstract

In this paper,the stress field and the stress- magnetic field theory for a crack domain are used to explain the principle of magnetic memory testing. The magnetic dipole model is employed to the quantitative research of crack length. The magnetic memory testing for different metal pipe cracks is made and the characteristics of magnetic memory signal are analyzed. It is shown that on the crack tip stress concentration appears,the magnetic field strength and it’s normal component reach the maximum. However,near the middle of the crack,the tangential component of the magnetic field intensity attends the crest and the normal component has zero-crossing feature. The crack length is approximately proportional to two parameters,the distance between the adjacent peaks of the tangential signal gradient,the distance between the peak and valley of the normal component of the signal. Based on the experiment,a calculation formula with good accuracy is suggested to determine the crack length and is proved by the experiment result.

关键词

磁记忆检测管道裂纹应力场磁偶极子定量化研究

Keywords

Magnetic memory testingMetal pipe crackStress fieldMagnetic dipoleQuantitative study

references

Views

364

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

ISOGEOMETRIC ANALYSIS OF STRESS INTENSITY FACTOR IN V-NOTCHED PLANE

RESEARCH ON THE 8-BALL UNIVERSAL JOINT INNER SLEEVE STRUCTURE AND STATIC STRENGTH DESIGN MATCHING BASED ON STRENGTH FIELD

STUDY ON MECHANICAL BEHAVIOR OF VOID UNDER THE INTERNAL PRESSURE AND EXTERNAL LOAD IN STEEL

STEADY-STATE TEMPERATURE FIELD AND STRESS FIELD ANALYSIS OF AUTOCLAVE TOOTH-LOCKED QUICK OPENING STRUCTURE

NUMERICAL SIMULATION OF TEMPERATURE FIELD AND STRESS FIELD FOR BRAKE DISK IN MINE HOIST

Related Author

No data

Related Institution

Hubei Province Key Laboratory of Systems Science in Metallurgical Process,Wuhan University of Science and Technology

College of Mechanical Engineering, University of Shanghai for Science and Technology

School of Mechanical and Power Engineering, Henan Polytechnic University

School of Chemical Engineering and Technology,Hebei University of Technology

The Special Equipment Inspection Institute of Zhongshan City

⁰