New technology for controlling hysteresis friction force of flexible materials

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K03833
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Maegawa Satoru 名古屋工業大学, 工学(系)研究科(研究院), 准教授 (90637406)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ソフトマテリアル / ゴム / ヒステリシス摩擦 / 摩擦制御 / スティックスリップ / 接触面観察

Outline of Final Research Achievements

When a viscoelastic material such as rubber slides on a hard rough surface, the deformation resistance generated when the rough surface asperities deform the rubber appears as hysteresis friction force. Generally, for designing hysteresis friction force, tanδ (it is a physical quantity indicating whether the elastic or viscous property is dominant and, expressed as the ratio of storage elastic modulus to loss elastic modulus of the rubber material) is often focused on as designing parameter. On the other hand, this study demonstrates through numerical simulations and experiments that hysteresis friction force can be designed from a different perspective from the conventional control of viscoelastic properties by imparting stiffness and density distributions near the surface of the rubber material.

Free Research Field

トライボロジー

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は，フレキシブル材料の摩擦設計の定量化に向けた技術的なブレークスルーを与えることである．バルクの剛性分布付与を摩擦制御に積極的に利用する本手法では，体系化された構造力学の既存知識（非線形FEM技術なども含む）をフルに活用できるうえに，3Dプリンタなどの最先端のバルク材料創製技術との融合により既往の縛りから解放された新しい発想のもとで摩擦力の定量設計が可能になると期待される．