Study of Ski Sliding Resistance Depending upon Snow Temperature and Sliding Velocity

• Project/Area Number: 22500570
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Sports science
• Research Institution: The University of Electro-Communications
• Principal Investigator: NIKKI Kunio 電気通信大学, 宇宙電磁環境研究センター, 客員研究員 (80208248)
• Co-Investigator(Kenkyū-buntansha): TOMISAWA Ichiro 電気通信大学, 宇宙・電磁環境研究 センター, 准教授 (50111696) ; KANEKO Katsumi 電気通信大学, 教育研究技師部, 統括学術技師 (90377036) ; SAITO Satoru 電気通信大学, 教育研究技師部, 学術技師 (50573151) ; ABE Osamu 独立行政法人防災科学研究所, 雪氷防災センター新庄支所, 研究員 (70414406) ; KAGAWA Hiroyuki 金沢大学, 機械工学系, 講師 (40251938) ; ISHII Akira 香川大学, 工学部, 教授 (90134866)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: スポーツバイオメカニクス / トライボロジー / 計測工学 / 表面・界面物性 / 雪 / スキー / 摩擦係数

Research Abstract

The ski sliding mechanism was studied to give the scientific base for the ski technology. Temperature and velocity dependence of static and kinetic frictional coefficients of a short model ski (20 cm length) were observed with well prepared snows which particle sizes and surface hardness were controlled. As the result, the observation were done for the low sliding velocity than real ski, the mechanism of ski sliding friction is explained by means of the temperature dependence of the adhesion force which contains the effect of the liquid-like layer of ice and the opposite temperature dependence of the shear force of ice. It is clear that there is no necessary to think about the melt-water lubrication theory for ski sliding because the low frictional resistance like real skis was taken place at low temperature and low velocity for the short model ski.

Research Products

• [Journal Article] Friction of the short model ski at low velocity (2010)
  • Author(s): Maiko Takeda, Kunio Nikki, Takaaki Nishizuka and Osamu Abe
  • Journal Title: Journal of Physics, Conference Series Volume: Vol. 258, No.1 Pages: 012007-012007
  • DOI: 10.1088/1742-6596/258/1/012007
• [Presentation] 雪とポリエチレンの凝着と摩擦 (2012)
  • Author(s): 仁木國雄,武田麻衣子,西塚貴章,香川博之,伊東智季,山田秀人,阿部修
  • Organizer: 日本雪氷学会・雪氷研究大会
  • Place of Presentation: 福山
• [Presentation] 雪表面に対するスキー滑走面の摩擦の振る舞い (2012)
  • Author(s): 伊藤智季,山田秀人,香川博之,仁木國雄,阿部修
  • Organizer: 日本機械学会2012年度年次大会
  • Place of Presentation: 金沢
• [Presentation] スキーと雪の摩擦メカニズム (2011)
  • Author(s): 仁木國雄、武田麻衣子、西塚貴章、笠原英明、中里光、金子克己、斎藤悟、阿部修,香川博之
  • Organizer: 日本スキー学会第21回大会
  • Place of Presentation: 新潟県高田
• [Presentation] Frictional Resistance of a Polyethylene-Base Model Ski at Low Velocity (2010)
  • Author(s): Kunio Nikki, Katsumi Kaneko, Satoru Saito, Hideaki Kasahara, Hikaru Nakazato, Ichiro Tomisawa, Shoji Haizuka, Osamu Abe, Akira Ishii
  • Organizer: International Symposium on Snow, Ice and Humanity in a Changing Climate
  • Place of Presentation: 札幌
• [Presentation] Frictional resistance of a polyethylene-base model ski at low velocity (2010)
  • Author(s): 仁木國雄, 他
  • Organizer: International Symposium on Snow, Ice and Humanity in a Changing Climate 2010
  • Place of Presentation: 札幌
• [Presentation] Friction of the short model ski at low velocity (2010)
  • Author(s): 武田麻衣子、仁木國雄, 他
  • Organizer: Science of Friction 2010
  • Place of Presentation: 伊勢志摩
• [Presentation] 雪とポリエチレンの凝着と摩擦
  • Author(s): 仁木國雄
  • Organizer: 日本雪氷学会・雪氷研究大会
  • Place of Presentation: 福山