Calculation model of deformation and stress-resultants of cylindrical helical torsion spring with variable cross-section used in overrunning clutch

Inhalt:
A method is presented for calculating force and deformation of cylindrical helical torsion springs. This is a spring applying to transmit torque in overrunning clutch, which is the key component of aircraft transmission. The distribution and deformation of the force are complicated by the special stress condition and the structure of variable cross-section. The paper analyzes the load on the spring and deduces stress-resultants at arbitrary position of the spring. The deformation of spring under load is solved by energy principle, the torsional stiffness of the clutch is derived accordingly.