Faculty Profiles - MATSUDA Kenji

Papers - MATSUDA Kenji

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Real contact area and friction property of rubber with two-dimensional regular wavy surface Reviewed International journal

Kenji Matsuda,Daisuke Hashimoto,Kenya Nakamura

Tribology International 93 523 - 529 2016.01

The Causes of Asymmetric Deformation of Surface Roughness Asperities in Elastohydrodynamic Lubrication Contacts Reviewed International journal

Kaneta M., Matsuda K., Nishikawa H.

Journal of Tribology 144 ( 6 ) 2022.06

Effects of Thermal Properties of Contact Materials and Slide-Roll Ratio in Elastohydrodynamic Lubrication Reviewed International journal

Kaneta M., Matsuda K., Nishikawa H.

Journal of Tribology 144 ( 6 ) 2022.06

Effects of carbon content and hardness on rolling contact fatigue resistance in heavily loaded pearlitic rail steels Reviewed

Ueda M., Matsuda K.

Wear 444-445 2020.03

Effect of specimen thickness on growth of real contact area of rubber with two-dimensional regular wavy surface Reviewed International journal

124 184 - 194 2018.08

Influence of Stress Factor on Void Closure Reviewed

MOURI Kengo, ARIMA Takeshi, FUKUYA Michiaki, MATSUDA Kenji

Journal of the Japan Society for Technology of Plasticity ( The Japan Society for Technology of Plasticity ) 59 ( 691 ) 149 - 157 2018.01

Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)

In the 2nd report, the evaluation factors for void closure under the condition of multipass forging revealed that true strain εz in the z direction is appropriate for the evaluation factors for void closure. However, although the effectiveness of the hydrostatic stress ratio σm /σeq for void closure was clear in the 1st report, the reasons were not clarified. In this paper, we investigated the effects of stress factors on void closure and its handling through numerical experiments. The following results were obtained. 1) By using the true stress in each direction, the deformation behavior of voids can be evaluated as a dimensional change of the diameter on the basis of the frictionless model. 2) In the z stroke direction, the void is easier to close than in the frictionless model when σz /σeq is -1 or less, and harder to close than in the frictionless model if not. 3) The void diameter in the x direction, dx , is smaller than in the frictionless model when σx /σeq is 0 or less, and larger than in the frictionless model if not. 4) When there is a void on the axis of symmetry, σm /σeq can be used to evaluate εz for void closure and the dimensional change of dx . In addition, we clarified the influences of material size, void size, and mechanical properties of the material on void closure.

DOI： 10.9773/sosei.59.149

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/sosei/59/691/59_149/_pdf

伝統的な硬さ試験４種の原理と特徴 Invited

松田　健次

月刊トライボロジー ( 新樹社 ) 38 ( 8 ) 12 - 16 2024.08

Effect of Presence or Absence of a Screw for Fixing Specimen on Rebound Hardness Test by Using Hammer with Vickers Indenter Reviewed

Hashiguchi Takeru, Matsuda Kenji

Tetsu-to-Hagane ( The Iron and Steel Institute of Japan ) 110 ( 7 ) 532 - 540 2024.05

Authorship：Last author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

For manufacturers, rapid and accurate quality control of materials and products in the field is essential for improving competitiveness. Rebound hardness testing is one of the fundamental material tests expected to meet this requirement. However, it has been known that many factors affect rebound hardness which may cause the fluctuation in the measured value. In order to elucidate the effect of the fixing method of the specimen, the coefficient of restitution of a hammer using a Vickers indenter was compared with and without bolting the specimen to the base. The motions of the hammer and the specimen were measured simultaneously using two laser Doppler vibrometers and were also numerically analyzed using an elastoplastic finite element method. It has been clarified that, in the case of without bolting, the restitution coefficient is decreased compared to with bolting. The decreasing tendency becomes larger as the impact point moves away from the specimen center. The rebounding behaviors of the hammer and the specimen without bolting can be reproduced with a numerical model in which an appropriate elastic film is inserted between the specimen and the base. The numerical results show that the hammer impact causes rigid body motion in the specimen, which consumes hammer energy, resulting in a decrease in the coefficient of restitution. The range in which the coefficient of restitution can change is also evaluated by assuming a simple two-body collision model.

DOI： 10.2355/tetsutohagane.tetsu-2024-004

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/tetsutohagane/110/7/110_TETSU-2024-004/_pdf

Elastic Contact between Solids with Typical Surface Shapes Invited

56 ( 2 ) 23 - 31 2024.01

Numerical Study on Method for Reducing Film Pressure and Its Fluctuation due to Surface Roughness in Elastohydrodynamic Lubrication Contact Reviewed International journal

Journal of Tribology 145 ( 3 ) 2023.03

「2列にお並びください」に秘められたメッセージ Invited

松田　健次

月刊トライボロジー ( 新樹社 ) 36 ( 1 ) 33 - 33 2022.01

Numerical Study on the Interaction of Transverse and Longitudinal Roughness on Elastohydrodynamic Lubrication Contact Surfaces with Different Thermal Conductivities and Elastic Moduli Reviewed

Kaneta M., Matsuda K., Wang J., Cui J., Yang P., Nishikawa H., Krupka I., Hart M.

Journal of Tribology 143 ( 9 ) 2021.09

Numerical Study on Effect of Thermal Conductivity in Point Contacts with Longitudinal Roughness on Abnormal Pressure Distribution Reviewed International journal

Kaneta M., Matsuda K., Wang J., Yang P.

Journal of Tribology 142 ( 12 ) 2020.12

Rebound Hardness Test and COVID-19 Problems

MATSUDA Kenji

JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS ( Japanese Society of Tribologists ) 65 ( 8 ) 469 - 469 2020.08

昔を懐かしんで Invited

松田健次

月刊トライボロジー ( 新樹社 ) 34 ( 8 ) 11 - 11 2020.08

Numerical Study on Effect of Dimples on Tribo-Characteristics in Non-Newtonian Thermal Elastohydrodynamic Lubrication Point Contacts with Different Mechanical and Thermal Properties Reviewed

Kaneta M., Matsuda K., Wang J., Yang P.

Journal of Tribology 142 ( 4 ) 2020.04

Verification of Effectiveness of Void Closure Evaluation Using True Strain by Actual Machine:―Study on Void Closure of Large Steel Ingot, 4th Report― Reviewed

MOURI Kengo, ARIMA Takeshi, FUKUYA Michiaki, MATSUDA Kenji

Journal of the Japan Society for Technology of Plasticity ( The Japan Society for Technology of Plasticity ) 61 ( 709 ) 40 - 47 2020.01

Language：Japanese Publishing type：Research paper (scientific journal)

Previous studies have shown that true strain is effective for evaluating void closure in multipass forging. However, the above-mentioned result was obtained by numerical simulation and an experiment using hot steel with a reduced-scale model having a spherical void, and it has not been confirmed whether it is effective with a real machine. Therefore, in this study, the effectiveness of using true strain was verified in real machine tests. The following conclusions were obtained. 1) In the ultrasonic test (UT) after the third forging, despite the equivalent strain applied to two steel ingots being the same, a large difference occurred in the defect distribution. From this result, it was clarified that the closing behavior of the void in actual machines under multipass forging cannot be evaluated using equivalent strain. 2) In the UT after the fourth forging, as a result of applying the same true strain to two steel ingots, the defects of both steel ingots almost disappeared and the results were the same. Therefore, it was clarified that the closing behavior of the void in actual machines under multipass forging can be evaluated using true strain.

DOI： 10.9773/sosei.61.40

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007801670

New Development of Rebound Hardness Test Invited

54 ( 12 ) 791 - 797 2019.12

Deformation of Rough Surfaces in Point EHL Contacts Reviewed

67 ( 2 ) 2019.06

空隙閉鎖に及ぼす応力因子の影響:―大型鋼塊の空隙閉鎖に関する研究第3報― Reviewed

毛利健吾, 有馬猛, 福谷理明, 松田健次

塑性と加工 2018.08

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