TourTourCalculator 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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