Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Mamoru TOHYAMA"'
Autor:
Mamoru Tohyama, Yasuhiro Ohmiya, Michiru Hirose, Hiroki Matsuyama, Takuya Toda, Kenichi Hasegawa, Takaaki Onizuka, Hideaki Sato, Masahiro Yokoi, Norikazu Sato
Publikováno v:
Tribology Online, Vol 19, Iss 3, Pp 149-156 (2024)
High-speed deep-groove ball bearings for the eAxle of electric vehicles must adapt to higher rotational speed conditions, because eAxle motor speed increases to downsize the unit. Therefore, it is necessary to clarify the lubrication process of ball
Externí odkaz:
https://doaj.org/article/5536428443744f659c976a33660b7748
Autor:
Mamoru Tohyama, Yasuhiro Ohmiya, Michiru Hirose, Hiroki Matsuyama, Takuya Toda, Kenichi Hasegawa, Takaaki Onizuka, Hideaki Sato, Masahiro Yokoi, Norikazu Sato
Publikováno v:
Frontiers in Mechanical Engineering, Vol 10 (2024)
Deep-groove ball bearings for the eAxles of electric vehicles must adapt to higher rotational speed conditions because the speed of eAxle motors have been increasing as the size and weight of the motors decrease. Therefore, understanding the oil-lubr
Externí odkaz:
https://doaj.org/article/97115f3e3ad14ec587f5235fff476ae0
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022)
Abstract In this study, we developed and practiced colorimetric optical interferometry for the direct observation of contact states to clarify contact phenomena. We theoretically demonstrated that the effect of roughness diffuse reflection could be n
Externí odkaz:
https://doaj.org/article/970849f2f7d54dde82efa8578b4b6068
Autor:
Naoko TAKECHI-TAKAHASHI, Kensuke MATSUSHIMA, Noritake ISOMURA, Satoru KOSAKA, Mamoru TOHYAMA, Hiroshi MORITANI, Takayuki AOYAMA, Toshinari SANO, Satoru MAEGAWA, Fumihiro ITOIGAWA
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 16, Iss 3, Pp JAMDSM0024-JAMDSM0024 (2022)
Energy-resolved HAXPES is proposed here as a method to analyze boundary layer formation on rough frictional surfaces, in which the vertical OLAP boundary layer structure containing organic components is non-destructively analyzed. In addition, HAXPES
Externí odkaz:
https://doaj.org/article/90dec7710a0b4fec81ab1e3e3d907bef
Publikováno v:
Tribology Online, Vol 16, Iss 2, Pp 89-98 (2021)
The dominant factors and processes for the rapid progression of scuffing from a partial area to an entire surface under lubricated, plane contact, and pure sliding conditions were studied by performing an in situ observation of the surface, and in si
Externí odkaz:
https://doaj.org/article/abb1762dfd3d43f9835ba5eb917c649b
Publikováno v:
Tribology Online, Vol 12, Iss 3, Pp 135-140 (2017)
DLC films are of significant interest for automobile parts, because they possess the potential to improve the friction property under oil lubricated conditions. In order to obtain further low friction, we focused on the combination of boron doped DLC
Externí odkaz:
https://doaj.org/article/4cc7af21cab44a089ebd92d0ec8e1028
Autor:
Seiji Kajita, Mamoru Tohyama, Hitoshi Washizu, Toshihide Ohmori, Hideyuki Watanabe, Shinichi Shikata
Publikováno v:
Tribology Online, Vol 10, Iss 2, Pp 156-161 (2015)
Numerous researchers have focused on the relation between kinetic friction and the surface properties of materials, such as their surface roughness and chemical state, because kinetic friction is the loss of kinetic energy at a sliding interface. Con
Externí odkaz:
https://doaj.org/article/5a82c9246b5a4c3bac257081682ecfef
Publikováno v:
Tribology Online, Vol 16, Iss 2, Pp 89-98 (2021)
The dominant factors and processes for the rapid progression of scuffing from a partial area to an entire surface under lubricated, plane contact, and pure sliding conditions were studied by performing an in situ observation of the surface, and in si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0236a858d5361c065f7ae47564d86e15
https://www.jstage.jst.go.jp/article/trol/16/2/16_89/_pdf/-char/en
https://www.jstage.jst.go.jp/article/trol/16/2/16_89/_pdf/-char/en
Autor:
Shuzo Sanda, Jun Koyamachi, Joichi Sugimura, Kazuyuki Yagi, Taisuke Izumi, S. Yamaguchi, K. Satio, Mamoru Tohyama
Publikováno v:
Tribology Letters. 68
Scuffing is a catastrophic failure that causes significant surface damages such as plastic flow and welding with a marked increase in friction, wear, temperature and noise. In this study, variations in the crystal grain structure of a steel surface w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45922b0adc5440603a94dc5290e7136d
https://doi.org/10.1007/s11249-020-01357-y
https://doi.org/10.1007/s11249-020-01357-y
Publikováno v:
Wear. :204162
We conduct in-situ observations of the wear process of metals in dry conditions. To this end, we constructed an experiment to observe the wear process of a point contact area, created between a rotating sapphire disc and a metal pin. The experimental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54d0e6b4256e378b760281c502224130
https://doi.org/10.1016/j.wear.2021.204162
https://doi.org/10.1016/j.wear.2021.204162