Tangential Force Ratio and Its Applications to Industrial Technologies: Anti-Vibration Steel Plate for Refrigerator and Derailment of Rolling Stock

Abstract

Within the engineering problem context, we can often observe those closely related to the two bodies-in-contact. The Friction is one of the representatives, and we believe, without any doubt, the Coulomb’s Friction Rule. In contrast, on the strength of some evidences so far observed, we must be aware of Tangential Force Ratio, which is not regulated by the Coulomb’s friction rule, i.e. friction under microscopic slip, but plays very important roles to increase the damping capacity of industrial machines and home appliances. Up to now, we can solve nearly all engineering problems related to the tangential force ratio; however, there remains still something to be seen. It is, for example, worth suggesting that the derailment of the rolling stock may be caused by the critical condition of the tangential force ratio; however, its detail is not clarified as yet.