Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method

The AE (Acoustic Emission) method is a technique for detecting ultrasonic sound waves generated by plastic deformation, crack initiation and crack growth by using an AE sensor. The AE method is used in checks of petroleum tank drawer bottom corrosion, degradation of steel and concrete structures, be...

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Autores principales:	Yoshiaki NISHINA, Daisuke IMANISHI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	acoustic emission crack check crack diagnosis rotary equipment magnetic fluid pencil-lead break Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/ecadf412a25644588e2f441addc6d0d2
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spelling	oai:doaj.org-article:ecadf412a25644588e2f441addc6d0d22021-11-26T07:03:57ZBasic study on crack diagnosis of rotary equipment by fluid-mediated AE method2187-974510.1299/mej.16-00406https://doaj.org/article/ecadf412a25644588e2f441addc6d0d22017-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/3/4_16-00406/_pdf/-char/enhttps://doaj.org/toc/2187-9745The AE (Acoustic Emission) method is a technique for detecting ultrasonic sound waves generated by plastic deformation, crack initiation and crack growth by using an AE sensor. The AE method is used in checks of petroleum tank drawer bottom corrosion, degradation of steel and concrete structures, bearing degradation checks, etc. The purpose of this study is to apply AE to crack checks of rotary equipment (drive shaft or coupling). First, we conducted a comparative test of AE propagation characteristics, followed by a comparative test of the crack detection signal by a small rotary bending fatigue testing machine. From the AE count rate in the rotary bending fatigue test, the number of cycles of the fatigue test can be divided into three areas. In the initial stage, an AE wave is generated by the dislocation motion in the material. An AE wave is estimated to occur due to the progress of a crack generated on the test piece surface. In this study, we propose a fluid-mediated AE method with an improved S/N ratio and showed that it is possible to detect a fatigue crack in a drive shaft or coupling by the proposed method.Yoshiaki NISHINADaisuke IMANISHIThe Japan Society of Mechanical Engineersarticleacoustic emissioncrack checkcrack diagnosisrotary equipmentmagnetic fluidpencil-lead breakMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 3, Pp 16-00406-16-00406 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	acoustic emission crack check crack diagnosis rotary equipment magnetic fluid pencil-lead break Mechanical engineering and machinery TJ1-1570
spellingShingle	acoustic emission crack check crack diagnosis rotary equipment magnetic fluid pencil-lead break Mechanical engineering and machinery TJ1-1570 Yoshiaki NISHINA Daisuke IMANISHI Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
description	The AE (Acoustic Emission) method is a technique for detecting ultrasonic sound waves generated by plastic deformation, crack initiation and crack growth by using an AE sensor. The AE method is used in checks of petroleum tank drawer bottom corrosion, degradation of steel and concrete structures, bearing degradation checks, etc. The purpose of this study is to apply AE to crack checks of rotary equipment (drive shaft or coupling). First, we conducted a comparative test of AE propagation characteristics, followed by a comparative test of the crack detection signal by a small rotary bending fatigue testing machine. From the AE count rate in the rotary bending fatigue test, the number of cycles of the fatigue test can be divided into three areas. In the initial stage, an AE wave is generated by the dislocation motion in the material. An AE wave is estimated to occur due to the progress of a crack generated on the test piece surface. In this study, we propose a fluid-mediated AE method with an improved S/N ratio and showed that it is possible to detect a fatigue crack in a drive shaft or coupling by the proposed method.
format	article
author	Yoshiaki NISHINA Daisuke IMANISHI
author_facet	Yoshiaki NISHINA Daisuke IMANISHI
author_sort	Yoshiaki NISHINA
title	Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
title_short	Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
title_full	Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
title_fullStr	Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
title_full_unstemmed	Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method
title_sort	basic study on crack diagnosis of rotary equipment by fluid-mediated ae method
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/ecadf412a25644588e2f441addc6d0d2
work_keys_str_mv	AT yoshiakinishina basicstudyoncrackdiagnosisofrotaryequipmentbyfluidmediatedaemethod AT daisukeimanishi basicstudyoncrackdiagnosisofrotaryequipmentbyfluidmediatedaemethod
_version_	1718409752895029248

Basic study on crack diagnosis of rotary equipment by fluid-mediated AE method

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