Faculty Profiles - TSUKIYAMA Yosuke

Papers - TSUKIYAMA Yosuke

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Elucidation of frictional properties between rubber and flooring using a laser microscope with wide field of view

Isami Nitta, Takuto Masuda, Yosuke Tsukiyama

Tribology International 174 107775 - 107775 2022.10

Mechanical behaviour of porous metals fabricated by low-power selective laser melting

Isami NITTA, Ryota TAKAHASHI, Yosuke TSUKIYAMA

Journal of Advanced Mechanical Design, Systems, and Manufacturing 16 ( 5 ) JAMDSM0047 - JAMDSM0047 2022

Vibration insensitive single-shot interferometry using a wide-field laser microscope Reviewed

Isami Nitta, Yosuke Tsukiyama

Precision Engineering 2021.10

Realization of A Novel Morphing Surface using Additive Manufacturing and its Active Control in Friction

Motoyuki Murashima, Yusuke Imaizumi, Masato Kawaguchi, Noritsugu Umehara, Takayuki Tokoroyama, Toshiyuki Saito, Masayuki Takeshima, Yosuke Tsukiyama, Isami Nitta

Journal of Tribology 1 - 29 2021.2

Publishing type：Research paper (scientific journal) Publisher：ASME International

<title>Abstract</title>
As the need for higher efficiency of engineering components increases, so does the demand for functional surfaces. While various tribosurfaces (e.g., texturing and coatings) have been developed, many researches are aimed at static functionality. On the other hand, due to a wide range of environmental adaptability and active control, active-morphing surfaces can be highly efficient and robust. In this paper, we demonstrate a novel morphing surface and its realization using additive manufacturing (AM). By using a diaphragm structure, morphing performance is achieved even if a hard resin material is used. When air pressure is applied to the backside of the diaphragm, it changes to a convex shape, and vice versa. The concept requires a complex structure for arranging airflow and a solid morphing system. The AM is one great technique to create such complex structure. As a result of actual manufacturing, the created morphing structure realizes a large morphing of 600 µm or more. In addition, the shape changes reversibly depending on the air pressure. The surface also exhibits very interesting tribological characteristics. The surface shows a friction coefficient of 0.5-1.7 with a convexity, and then decreases to about 0.3 with a concavity. A real-contact area measurement reveals that the novel property occurs due to change in the real-contact area depending on surface morphology. In conclusion, the present paper provides a new concept of a novel morphing tribosurface, which selectively performs as a low-friction or break-like surface, created using AM.

DOI： 10.1115/1.4050269

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Effect of power adhesion on the friction and wear of rubber rollers Invited

Yosuke Tsukiyama, Isami Nitta

TJTS2018 15 - 16 2018.11

Single-shot measurement of 3D surface profiles using wide field view laser microscope

Isami Nitta, Takuya Sato, Yosuke Tsukiyama

ICPE2018 2018.11

Influence of Paper Lint on Friction and Wear of Rubber Rollers

Yosuke Tsukiyama, Isami Nitta

ISPS/MIPE2018 2018.8

Visualization of contact patterns of thermal printhead for indirect thermal transfer printing Reviewed

Toshiki Irii, Masaya Kou, Yousuke Tsukiyama, Isami Nitta, Tomoko Wauke, Hirotoshi Terao

Journal of Advanced Mechanical Design, Systems, and Manufacturing 12 ( 2 ) JAMDSM0048 2018.5

A novel single shot interferometry with a wide field of view by reference plates coated with various metals Reviewed

Yuta Ohara, Yosuke Tsukiyama, Isami Nitta

Precision Engineering 52 345 - 355 2018.4

Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Inc.

A laser microscope with a wide field of view developed in our previous study allowed us to observe the whole surface of a cylinder in a very short time. In that study, resolution of the laser microscope in the depth direction was sacrificed to obtain a wide field of view. To overcome this shortcoming and achieve nano-level measurement of 3-dimensional profiles of various objects, we have introduced two-beam interferometry to the wide field of view laser microscope. To achieve a high contrast interference fringe pattern, a glass reference plate was coated with a thin Cr film or other pure metals. The interference fringe pattern was distorted from sinusoidal wave into a sawtooth-like waveform. The distortion of the interference fringe pattern appeared to correspond to the inclination of the specimen surface measured. This shows the possibility of realizing a novel single shot interferometry method capable of determining the surface profile from only one image of the interference fringe pattern without using the phase shift method. The type of distortion of intensity distribution was different for each metal. The mechanisms by which the intensity distribution of the interference fringes changed to sawtooth pattern are discussed from both a Fourier-transform analysis and an electromagnetic approach.

DOI： 10.1016/j.precisioneng.2018.01.015

Scopus

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Laser microscope interferometer with wide field of view

Isami Nitta, Yosuke Tsukiyama

Toraibarojisuto/Journal of Japanese Society of Tribologists 63 ( 4 ) 276 - 279 2018

Proposal of lightweight and low starting torque slide bearing with looped carbon fibers brush Reviewed

Takuya SHITAKA, Motoyuki MURASHIMA, Noritsugu UMEHARA, Yosuke TSUKIYAMA, Isami NITTA, Hiroyuki KOUSAKA, Xingrui DENG

Transactions of the Japan Society of Mechanical Engineers 83 ( 854 ) 17-00252 - 00252-17-00252 2017.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers

<p>This paper addresses a novel lightweight and low starting torque bearing with looped carbon fiber brush (LCFB). LCFB simulates bristle of living being. Moreover, the static friction coefficient is nearly equal to the kinetic friction coefficient. By applying LCFB to a slide bearings, where a shaft is supported by multiple LCFBs, it is realized low starting torque bearings as well as lightness compared to conventional ball bearings. In this paper, we manufacture prototype LCFB slide bearings. With the bearings, we compare friction torque between LCFB slide bearings, slide bearings and deep groove ball bearings. As results, the ratio of starting torque to regular torque of LCFB slide bearing is from 0.93 to 1.07 which is smaller than that of the slide bearing. When micro-spline shaft is used as a mating material of LCFB slide bearing, the torque reduces because of decrease of real contact area between LCFB and mating materials. In addition, since LCFB utilize elastic deformation of fibers, LCFB slide bearings are not endurable in heavy radial load as high as load rating of ball bearing. Therefore, we define the load capacity of LCFB slide bearing from buckling load of a carbon fiber bundle to avoid overload state. We propose the load capacity as a design guideline of LCFB slide bearings.</p>

DOI： 10.1299/transjsme.17-00252

CiNii Article

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Laser micro texturing for high friction surface

Yosuke Tsukiyama, Honda Masanori, Tsuyoshi Kakiuchi, Yusuke Aida, Isami Nitta

ICOA2017 (International Conference on Optoacoustics) 2017.5

One-shot measurement of surface profile using wide field view laser microscope

Isami Nitta, Hirotoshi Watanabe, Yosuke Tsukiyama

ICOA2017 (International Conference on Optoacoustics) 2017.5

Frictional Property and Real Contact Area of Contaminated Rubber Rollers for Paper Feed

Yosuke Tsukiyama, Yohei Sato, Keisuke Kato, Isami Nitta

ICMDT2017 (The 7th International Conference on Manufacturing, Machine Design and Tribology) 220 2017.4

Proposal of new polyaxial locking mechanism of osteosynthesis plate

Hiroya Toyosaki, Yosuke Tsukiyama, Isami Nitta

ICMDT2017 (The 7th International Conference on Manufacturing, Machine Design and Tribology) 255 2017.4

A novel measurement method of real contact area of floor materials using ultra-high transparent rubber

Takuto Masuda, Yosuke Tsukiyama, Isami Nitta

ICMDT2017 (The 7th International Conference on Manufacturing, Machine Design and Tribology) 88 2017.4

広視野レーザ顕微鏡による円筒内外面とカムの全周観察 Reviewed

新田勇, 福島直幸, 江渕倫太郎, 月山陽介

精密工学会誌 82 ( 11 ) 976 - 982 2016.11

Contact thermal resistance of densely-packed VACNTs and deformation mechanics of CNTs

Yosuke Tsukiyama, Takumi Kawasaki, Isami Nitta, Wataru Norimatsu, Michiko Kusunoki

International Conference on Diamond and Carbon Materials 2016.9

Evaluation of transformed layer hardness of DLC coating after friction test Reviewed

Nor Azmmi Masripan, Yosuke Tsukiyama, Kenji Ohara, Noritsugu Umehara, Hiroyuki Kousaka, Takayuki Tokoroyama, Shigeru Inami, Koji Zushi, Masahito Fujita

Jurnal Teknologi 78 ( 10-3 ) 43 - 47 2016

Language：English Publishing type：Research paper (scientific journal) Publisher：Penerbit UTM Press

Diamond-like carbon (DLC) provide very excellence performance in term of friction coefficient and wear resistance under boundary lubrication. the nano characteristic of the transformed layer has not been studied in terms of its hardness which is believed to have a significant effect in the tribological performance. This study presented the scratch test of the DLC transformed layer was obtained from the AFM scratch test that governs the friction behavior of DLC. As a result, the hardness of the DLC transformed layer depends on the oil temperature, where the sliding interface of DLC softened during the friction test due to graphitization process.

DOI： 10.11113/jt.v78.9761

Scopus

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Fundamental study of acoustic leakage through a gap between gasket and flange surface Reviewed

Shuichi Sakamoto, Takanari Azami, Isami Nitta, Yosuke Tsukiyama

JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING 10 ( 4 ) JAMDSM0067 2016

Language：English Publishing type：Research paper (scientific journal) Publisher：JAPAN SOC MECHANICAL ENGINEERS

In this study, we theoretically and experimentally explore the acoustic leak of an entire acoustic system as well as the various gap occurring between a gasket and flange. We conducted the first-ever fundamental research related to sound transmission loss through a narrow gap between a gasket and flange. In the experiments, we constructed pipeline elements, including the gap and the leakage path, in the impedance measurement tube. In the theoretical analysis, we replaced the fluid path, including the gap, with acoustic elements that comprise an electrical equivalent circuit. We then conducted the analysis using the transfer matrix method. To calculate the attenuation of sound waves propagating through the gap, we considered friction in association with viscosity, primarily in the boundary layers of the inner wall, to derive the characteristic impedance and propagation constant. The trends between the calculated and the actual experimental values for transmission loss in the entire acoustic system coincided enough with regard to a large gap size range between 0.01 and 0.2 mm. Furthermore, the transmission loss linearly increased with the decreasing logarithm of gap for the calculated regions. Furthermore, the theoretical analysis and experimental results show agreement for incline gap conditions between the gasket and flange. The maximum gap also greatly affects the acoustic transmission loss for the inclined gaps. This was confirmed both by the experimental and the calculated values. We consider that these results provide fundamental acoustic knowledge specific to the narrow gap between the gasket and flange in an acoustic system.

DOI： 10.1299/jamdsm.2016jamdsm0067

Web of Science

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Papers - TSUKIYAMA Yosuke