Abstract
In this study, the repulsive coefficient is an important indicator for the development of devices that use impact force, in order to use impact force more greatly. Therefore, we have to investigate means to select metal materials with high repulsive coefficient. If the collision phenomenon is repeated, metal is the material of choice because of the durability and availability of the collision part. There are various indicators for the mechanical properties of metal materials, but the direct relationship between mechanical material properties and repulsive coefficient has not been investigated. In our research group, we investigate experimentally assuming that thermal properties are related to damping ratio. In addition, we investigate whether there is a relationship between temperature change, thermal conductivity and repulsive coefficient. As an experiment, a rotating bending fatigue test is performed to measure thermal characteristics. Also a drop test is performed to calculate the repulsive coefficient. As a result, in the rotating bending fatigue test, the heat generated by the test is heat conducted to the grip side. Other than, when measuring thermal properties in a rotating bending fatigue test, the amount of deflection must be close. In the drop test, the relationship between thermal conductivity and repulsive coefficient is not found at present.
