# Tension of a tube with a transverse hole

## Values for calculation

## Calculation

### Coefficient $ C_1 $

### Coefficient $ C_2 $

### Coefficient $ C_3 $

### Stress concentration factor with the nominal stress based on gross area

### Maximum normal stress

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$$C_1=3$$

$$C_2=0.427-6.770\cdot\left(\cfrac{d_i}{D}\right)+22.698\cdot\left(\cfrac{d_i}{D}\right)^2-16.670\cdot\left(\cfrac{d_i}{D}\right)^3$$

$$C_3=11.357+15.665\cdot\left(\cfrac{d_i}{D}\right)-60.929\cdot\left(\cfrac{d_i}{D}\right)^2+41.501\cdot\left(\cfrac{d_i}{D}\right)^3$$

$$K_{tg}=C_1+C_2\cdot\left(\cfrac{d}{D}\right)+C_3\cdot\left(\cfrac{d}{D}\right)^2$$

$$σ_{max}=\cfrac{K_{tg}\cdot P}{\left(π/4\right)\cdot\left(D^2-d_i^2\right)}$$