Yuji Tsuchida

Oita University

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Masato Enokizono

Oita University

Takashi Todaka

Oita University

Yuichiro Kai

Kagoshima University

Terutoshi YAKUSHIJI

National Institute of Technology, Oita College

M. Oka

National Institute of Technology, Oita College

Tomasz Chady

West Pomeranian University of Technology

M. Enokizono

Nippon Bunri University

Mohachiro Oka

Nippon Bunri University

Hiroyasu Shimoji

Oita University

Dale E. Chimenti

Iowa State University

Cooperative Institutions

Oita University

Budker Institute of Nuclear Physics

Siberian Branch of the Russian Academy of Sciences

National Institute of Technology, Oita College

West Pomeranian University of Technology

University of Szczecin

Zachodniopomorskie Centrum Onkologii

Russian Academy of Sciences

Hitachi (Japan)

Nippon Bunri University

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Effect of Stress on Vector Magnetic Property of Non-oriented Electrical Steel Sheet (特集 Asia-Pacific Symposium on Applied Electromagnetics and Mechanics 2010 (APSAEM2010))

Applied and Environmental Microbiology (2011)

Yuichiro Kai Yuji Tsuchida Takashi Todaka M. Enokizono

Electromagnetics

Asia-Pacific

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Effect of Stress on Vector Magnetic Property and Two-dimensional Magnetostriction of a Non-oriented Electrical Steel Sheet

Journal of the Japan Society of Applied Electromagnetics and Mechanics (2013)

Yuichiro Kai Yuji Tsuchida Takashi Todaka Masato Enokizono

This paper presents effect of stress on vector magnetic properties and two-dimensional magnetostriction of a non-oriented electrical steel sheet. In order to evaluate two-dimensional magnetostriction under stress in the electrical steel sheet, a new six-axial stain gauge is developed. Results reveal that the amplitude and direction of the magnetic field strength vector and magnetostriction differ strongly due to the tensile and compressive stresses. In particular, it was clear that the direction of the magnetic field strength vector and magnetostriction was not parallel to the applied stress direction. In addition, the peak-to-peak value of the magnetostriction and magnetic power loss increased when the stress is applied. Therefore, evaluation of the amplitude and direction in a two-dimensional magnetostriction is necessary in order to know the relationships between the magnetic properties and stress.

Electrical steel

Inverse magnetostrictive effect

10.14243/jsaem.21.482

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Citations (1)

Regularization Method for Identification of Crack Shape using Laplace BEM.

Journal of the Magnetics Society of Japan (2000)

Yuji Tsuchida Masato Enokizono

We studied a detection and identification method for cracks and defects, using eddy current testing (ECT). To use impulse excitation, we performed numerical analysis by the boundary element method (BEM) with Laplace transforms. The shapes of cracks and defects are obtained directly from the BEM integral equation. We applied the singular value decomposition (SVD) and regularization method to the matrix for the unknown variables to obtain proper crack shapes.

Regularization

Matrix (chemical analysis)

Impulse response

10.3379/jmsjmag.24.851

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Evaluation of fatigue damage in an austenitic stainless steel (SUS304) using the eddy current probe

INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005. (2005)

M. Oka Terutoshi YAKUSHIJI Yuji Tsuchida Masato Enokizono

In order to prevent accidents, it is very important to evaluate fatigue damage in an austenitic stainless steel, which is widely used in structural components of industries. Some research groups have already proposed the evaluation method such as the residual magnetization method for this purpose. The residual magnetization method was effective to evaluate fatigue damage in austenitic stainless steels. However, this method was hard to use on site because that a magnetizer is needed. Therefore, we developed the non-destructive (NDT) system with an eddy current probe to use on site. This system could clearly detect fatigue process including damage accumulation in SUS304 (ANSI-304). In this paper, we report on the detection result of the plane bend fatigue damage of SUS304 and the NDT system with the eddy current probe.

Austenitic stainless steel

10.1109/intmag.2005.1463642

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Citations (2)

Examination of Measurement Method for Magnetostriction of Electrical Steel Sheet with Lock-in Amplifier

IEEJ Transactions on Fundamentals and Materials (2012)

Yuichiro Kai Yuji Tsuchida Takashi Todaka Masato Enokizono

It is important to measure magnetostriction under mechanical stress in order to clarify the relationships between magnetic property and stress. However, it is difficult to measure the magnetostriction of the electrical steel sheet because the quantity of the magnetostriction is very small. In this paper, we examine measurement method with a lock-in amplifier to improve the measurement accuracy of magnetostriction. From the result, the lock-in amplifier is very useful to measure the magnetostriction of the electrical steel sheet in comparison with a commercial strain amplifier.

Lock-in amplifier

Electrical steel

10.1541/ieejfms.132.1033

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2015 IEE-Japan Industry Applications Society Conference —Conference Information and Registration—

IEEJ Transactions on Industry Applications (2015)

Masato Chair Yuji Tsuchida

オーガナイズドセッション等論文分野 (1.1) 電力変換回路・制御方式，(1.2) 電力変換応用，(1.3)電力変換基盤・周辺技術 (2.1) 産業計測応用，(2.2) 産業制御応用，(2.3)モーションコントロール (3.1) 回転機，(3.2) 静止器，(3.3)回転機制御技術，(3.4)リニアドライブ，(3.5)磁気浮上・磁気軸受・超電導応用 (4.1) 自動車技術，(4.2) ITS 技術，(4.3)家電・民生 (5.1) ものづくり，(5.2) 次世代産業システム，(5.3)電気鉄道，(5.4)スマートファシリティ，(5.5)公共施設本大会に関する最新情報は，以下の大会 Web サイトで随時公開致しますのでご覧ください。

10.1541/ieejias.135.nl6_9

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Development of the Non-Destructive Evaluation System Using an Eddy Current Probe for Detection of Fatigue Damage in a Stainless Steel

AIP conference proceedings (2006)

M. Oka Terutoshi YAKUSHIJI Yuji Tsuchida M. Enokizono

The non‐destructive evaluation system which is developed using an eddy current probe to evaluate fatigue damage in an austenitic stainless steel is reported in this paper. This probe is composed of the ferrite core and two pick‐up coils connected differentially. The eddy current induced by the excitation coil is disarranged by nonuniform distribution of electromagnetic characteristics due to fatigue damage. The structural function of the eddy current probe proposed, enable to detect the eddy current disarrangement by fatigue damage. This probe detects the change of electromagnetic characteristics in the direction of X. In this paper, SUS304, a austenitic stainless steel was used as the sample. The experimental results show that the output voltage of the probe clearly depends on the number of stress cycles.

Austenitic stainless steel

Ferrite core

10.1063/1.2184546

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A New CD Mastering Processing Using Direct Stream Digital

Journal of the Audio Engineering Society (1996)

Ayataka Nishio Makoto Akune Gen Ichimura Yasuhiro Ogura Yuji Tsuchida

Stream Processing

Source

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Citations (6)

Surface Crack Growth Path and Fatigue Life Prediction Due to Repeated Rolling/Sliding Contact

JSME International Journal Series A (2003)

Takahito Goshima Sotomi ISHIHARA Masayoshi Shimizu Hirokazu Yoshida Yuji Tsuchida

This paper deals with the surface crack growth path description and the fatigue life prediction due to repeated rolling/sliding contact on the elastic half-space, accompanied by frictional heat generation and crack-face pressure. The stress intensity factors are analyzed for the surface crack which is kinked in multiple times from the inclined initial main crack. The rolling/sliding contact is simulated as a Hertzian contact pressure and a frictional load with heat generation, moving with constant velocity over the surface of the half-space. Applying the maximum energy release rate criterion to each kinked angle, the crack growth path can be described, and employing a mixed mode fatigue crack growth law, the associated fatigue life also can be predicted. The effects of frictional coefficient, slide/roll ratio and crack-face pressure on the crack growth path and associated life are considered for a high carbon-chromium bearing steel (AISI52100).

Paris' law

10.1299/jsmea.46.582

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Citations (6)

ESTIMATION OF FATIGUE DAMAGE FOR AN AUSTENITIC STAINLESS STEEL (SUS304) USING A PANCAKE TYPE COIL

AIP conference proceedings (2008)

M. Oka Yuji Tsuchida S. Nagato Terutoshi YAKUSHIJI Masato Enokizono

There are some fatigue damage estimation methods of an austenitic stainless steel that uses martensitic transformation. For instance, those are the remanent magnetization method, the excitation method, and so on. Those two methods are researched also in our laboratory now. In the remanent magnetization method, it is well known that the relationship between fatigue damage and the remanent magnetization is simple, clear, and reproducible. However, this method has the disadvantage to need a special magnetizer. Then, this method cannot be easily used at the job site such as the factory. On the other hand, as the special magnetizer is unnecessary, the excitation method can be easily used at the job site. But, this method has some disadvantages shown as follows. For instance, the output signal of this method is small. And the surface state of the specimen strongly influences the noise component of the output signal. It is well known that the inductance of a pancake type coil put on the metallic specimen changes according to the electromagnetic properties of the metallic specimen. In this paper, the method of evaluation of fatigue damage of an austenitic stainless steel (SUS304) by using a change of an inductance of a pancake type coil is shown. In addition, the fatigue evaluation performance of this method is described.

Austenitic stainless steel

SIGNAL (programming language)

10.1063/1.2902576

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Citations (7)