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# Solid circular section

## Values for calculation

## Calculation

### Polar moment of inertia

$$K=\cfrac{1}{2}\cdot π\cdot r^4$$### Angle of twist

$$θ=\cfrac{T\cdot 10^3\cdot L}{K\cdot G}$$### Torsion stress

$$τ_{max}=\cfrac{2\cdot 10^3\cdot T}{π\cdot r^3}$$