硬式野球用木製バットの打撃時における破損の起点について

抄録

A wooden baseball bat may break after hitting. The breakage occurs in various forms and the causes are still unknown. In this study, the stress generated by impacting a ball was obtained with three-dimensional finite element analysis. The analysis includes the impact force due to the ball and also the inertial force generated by the moving bat in swinging. The FEM shows the variation of stress distribution with the collision points. As compared with the observation of more than 150 broken bats, the model can successfully locate the points of breakage.