Calculator for Torsion springs
Diameter of spring wire d	10-3 m
Spring length r	10-3 m
Effective spring length L	10-3 m
Modulus of elasticity E	109 Pa
Spring force F	N
Tensile stress σ	106 Pa
Spring deflection dφ	deg
Spring deflection dφ	rad
Spring deflection df = r dφ	10-3 m
Spring stiffness k = F / dφ	N/deg
Spring stiffness k = F / dφ	N/rad
Spring stiffness k = F / (r dφ)	N/m
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