J. Phys. IV France 10 (2000) Pr9-547-Pr9-552
Dynamic properties of golf ballsT. Kurokawa1 and D. Urabe2
1 Department of Mechanical Engineering, Setsunan University, Neyagawa, 17-8 lkeda Nakamachi, 572-8508 Osaka, Japan
2 Graduate School, Setsunan University, Neyagawa, 17-8 Ikeda Nakamachi, 572-8508 Osaka, Japan
This work describes the experimental method to obtain the dynamic load-deformation curve of the golf ball and some experimental results conducted in impact velocity of 20-70m/s. The ball is made to collide directly with the end of the pressure bar, through the strain gage on which the load history is obtained and the deformation history is also obtained integrating the equation of motions of the ball using load history. The dynamic load-deformation curves are compared with quasi static curves. The dynamic relation shows similar non-linearity and strong strain hysteresis as quasi static relation. Energy loss due to hysteresis during loading and unloading process increases with the amount of the maximum deformation (at the same time with impact velocity) and reaches up to 40% at impact velocity of 70m/s.
© EDP Sciences 2000