Shaft stiffened by axial pre-stress

摘要: A long shaft comprising a number of axially pre-stressed members, one inside the other, sum bending rigidities tensioned members is greater than compression enhanced in stiffness such that end deflection under simultaneous transverse load and axial force has an less same shaft, which no pre-stress. The may be golf club shaft. An example shows flex “s” ordinarily 3.5 inch, measured from board, stiffened into super stiff with 1.54 without having weight increase or change material.