# Flat wire helical spring (given the deflection of spring)

## Values for calculation

## Calculation

### Shear admissible stress

### Force

### Spring stiffness

### Energy stored

### Shear stress

### Safety factor

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$$τ_{adm}=\cfrac{S_y}{\sqrt{3}}$$

$$F=\cfrac{f\cdot d^4\cdot G\cdot 10^3}{44.9\cdot n\cdot\left(\cfrac{D}{2}\right)^3}$$

$$k=\cfrac{F}{f\cdot 10^{-3}}$$

$$E_p=\cfrac{F\cdot f\cdot 10^{-3}}{2}$$

$$τ_S=\cfrac{4.8\cdot F\cdot\cfrac{D}{2}}{d^3}$$

$$τ_S\le τ_{adm}$$

$$S_F=\cfrac{τ_{adm}}{τ_S}$$