Theoretical and Experimental Research on Magnetic Flux Stress Testing Method for Steel Structure

2011 ◽  
Vol 4 (3) ◽  
pp. 1042-1046
Author(s):  
Ergang Xiong ◽  
Sheliang Wang ◽  
Junhai Zhao ◽  
Xiaoyu Miao
Keyword(s):  
Magnetic Flux ◽  
Experimental Research ◽  
Stress Testing ◽  
Steel Structure ◽  
Testing Method

scholarly journals Magnetic Flux Leakage Course of Inner Defects and Its Detectable Depth

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Jianbo Wu ◽  
Wenqiang Wu ◽  
Erlong Li ◽  
Yihua Kang
Keyword(s):  
Magnetic Flux ◽  
Steel Structure ◽  
High Sensitivity ◽  
Magnetic Flux Leakage ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Near Surface ◽  
Testing Method ◽  
Non Destructive ◽  
Flux Leakage

AbstractAs a promising non-destructive testing (NDT) method, magnetic flux leakage (MFL) testing has been widely used for steel structure inspection. However, MFL testing still faces a great challenge to detect inner defects. Existing MFL course researches mainly focus on surface-breaking defects while that of inner defects is overlooked. In the paper, MFL course of inner defects is investigated by building magnetic circuit models, performing numerical simulations, and conducting MFL experiments. It is found that the near-surface wall has an enhancing effect on the MFL course due to higher permeability of steel than that of air. Further, a high-sensitivity MFL testing method consisting of Helmholtz coil magnetization and induction coil with a high permeability core is proposed to increase the detectable depth of inner defects. Experimental results show that inner defects with buried depth up to 80.0 mm can be detected, suggesting that the proposed MFL method has the potential to detect deeply-buried defects and has a promising future in the field of NDT.

scholarly journals A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead

Sensors ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 201 ◽  
Author(s):  
Jianbo Wu ◽  
Hui Fang ◽  
Long Li ◽  
Jie Wang ◽  
Xiaoming Huang ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Flux Leakage ◽  
Testing Method ◽  
Drill Pipes ◽  
Lift Off ◽  
Flux Leakage ◽  
Magnetic Flux Leakage Testing

scholarly journals THE MECHANISMS OF STRESS REACTIONS BY PERSONS OF DANGEROUS PROFESSIONS: METHODOLOGY OF PSYCHOPHYSIOLOGICAL RESEARCH

2013 ◽  
Vol 12 (2) ◽  
pp. 66-71 ◽  
Author(s):  
D. I. Tishakin
Keyword(s):  
Experimental Research ◽  
Stress Testing ◽  
Self Regulation ◽  
Stress Reactions ◽  
Stress Situation ◽  
Psychophysiological Research ◽  
Psychophysiological Testing ◽  
The Military

In this article we are describe an experimental research dedicated to study of psychophysiological mechanisms of self-regulation by persons of dangerous professions. The study was conducted on a group of cadets of the military university. The methodology base includes the methods of psycho-diagnostics, psychophysiological testing, and specially designed protocols of stress-testing are modeled the stress situation. There short analysis of performed experiment is given by psychophysiological research position also conducts in article.

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