# Helical torsion spring round (given the force on spring)

## Values for calculation

## Calculation

### Applied torque moment

### Bending stress

### Safety factor

### Spring angular deflection

### Spring stiffness

### Energy stored

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$$M=F\cdot r\cdot 10^{-3}$$

$$σ_B=\cfrac{32\cdot M\cdot 10^3}{π\cdot d^3}$$

$$σ_B\le σ_{adm}$$

$$S_F=\cfrac{σ_{adm}}{σ_B}$$

$$φ=\cfrac{2\cdot π\cdot D\cdot n\cdot σ_B}{E\cdot 10^3\cdot d}\cdot\cfrac{180}{π}$$

$$k=\cfrac{F}{r\cdot 10^{-3}\cdot φ\cdot\cfrac{π}{180}}$$

$$E_p=\cfrac{F\cdot r\cdot 10^{-3}\cdot φ\cdot\cfrac{π}{180}}{2}$$