衝撃負荷下におけるゴルフボールの力学的特性

概要

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The mechanical properties, especially load-deformation relations under quasi-static and impact loading, of golf balls have been investigated. Dynamic compression tests have been conducted by the method that the ball is made to collide with the stress bar at velocities of 20〜65 m/s and the load-deformation curves are obtained by integrating the stress wave histories. The following results have been obtained. The load-deformation curves show non-linearity mainly due to geometrical factor and show hysteresis due to internal friction of the ball both under static and dynamic loading. The ratio of energy loss due to internal friction to input energy increases with the amount of deformation. In collision of the ball with the stress bar, only 70% to 45% of the initial kinetic energy is converted to the rebound kinetic energy. This ratio decreases with increase of the impact velocity. Among the rest of the energy, 25% to 45% is dissipated by internal friction, about 8% is transmitted as elastic wave energy to the stress bar and the rest several % remains in the ball as strain energy and vibration energy.
一般社団法人日本機械学会の論文
2002-02-25