ABSTRACT
The relation between the golf club head and golf ball coefficient of restitution (COR), with the frequency as well as face thickness of golf club heads were investigated. Also a sensitivity analysis was conducted to investigate the ratio of effect by the wall thickness of each part of the face, namely the rigidity on head frequency. By this, it was found that the sensitivity of the wall thickness on the heal side was greater than the sensitivity of the wall thickness on the toe side and had a greater effect on frequency of the head. It was found that the reason for this was because with heads having constant thickness, the strain occurring at the heal part is smaller than the strain occurring at the toe part when impact is made at the center of the face.
Also, when COR distribution was measured, golf club heads with variable thickness design with the heel part made thinner had a wider range of high COR compared with golf club heads with constant thickness, having the same maximum COR.
