Relation between friction of snow surface and micro bonding of snow particles in skiing

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K11448
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Komatsu University
• Principal Investigator: Kagawa Hiroyuki 公立小松大学, 生産システム科学部, 教授 (40251938)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: スキー / 雪 / マイクロ負荷試験 / 真実接触面積 / 凝着力

Outline of Final Research Achievements

This study experimentally investigates the question of how the micro bonding forces between snow particles and a sliding surface of skis, affect macroscopic frictional characteristics. Using a newly developed two-axis micro-load testing device, an indentor of snow was pressed vertically onto a glass plate regarded as a ski surface. Subsequently, horizontal forces were applied to the glass plate to measure micro static friction. Prior to this, adhesive forces were evaluated by unloading after vertical compression. This device allows measurement of forces in two directions and also simultaneously measures the true contact area during experiments. Furthermore, macro static friction was measured by towing glass plate sliders on snow surfaces.

Free Research Field

スポーツ科学

Academic Significance and Societal Importance of the Research Achievements

スキー板を開発する上で雪面摩擦発生のメカニズムの解明が課題になっている。本研究により、真実接触面積を測定しながら押し込みおよび静止摩擦実験を行うことのできる２軸マイクロ負荷試験装置を開発することができた。これにより、滑走面の表面エネルギーと雪面の凝着力の関係が実験的に明らかになった。また、凝着力と静止摩擦の関係についても調べることができた。これらの成果は、スキー開発に限らず、冬タイヤの開発や屋根の着雪対策など研究に役立つと考えている。