S1110604 床面のすべり防止を目的としたゴム材-床材間の摩擦特性の解明手法

抄録

Nowadays the overturn and fall accidents of elderly people is becoming a frequent medical accident in Japan where the birthrate is falling and the population is aging. It can be suggested that one reason for the overturn and fall accidents of elderly people is the slipping between the road surface and the shoe sole. To clarify the contact mechanism between the shoe sole and the floor is important. In this study, we used a transparent silicone rubber and we assumed it as a shoe sole. We observed the real area of contact between a silicon rubber and the floor. By using a transparent rubber, we could make the contact interface between an elastic rubber surface and a rough surface of harder material. We found that a microscopic observation over 10mm wide range, which has been accomplished by the laser microscope with wide field of view, is important to output a reliable experimental result. We clarified an influence of the external normal force and a tangential force on a real contact area and mechanism of the slipping between the floor surface and the shoe sole.