326 ゴルフボール用樹脂およびゴムの衝撃圧縮特性(OS 材料・構造の動的特性(5))

抄録

In order to understand fully the restitution performance of two different types of golf balls, high strain-rate compressive characteristics of resin and rubbers used for 2-piece and 3-piece balls were evaluated using the conventional split Hopkinson bar. An aluminum split Hopkinson bar was used to measure the impact compressive stress-strain relations for the resin and rubbers with low acoustic impedance. Compressive stress-strain data at high strain rates are presented and compared with those at quasi-static strain rates obtained on an Instron testing machine. It is shown that the resin exhibits hisher strain rate sensitivity than does the rubbers.