Radial hole in a hollow or solid circular shaft for elastic stress, elastic stress, torsional loading
s_formulas_for_Stress_and_Strain/Stress_concentration_factors_for_elastic_stress_(TABLE_17(and46)1)/Radial hole in a hollow or solid circular shaft.svg "Radial_hole_in_a_hollow_or_solid_circular_shaft")
Values for calculation
Calculation
Coefficient $ C_1 $
$$C_1=4.000$$
Coefficient $ C_2 $
$$C_2=-6.793+1.133\cdot d/D-0.126\cdot\left(d/D\right)^2$$
Coefficient $ C_3 $
$$C_3=38.382-7.242\cdot d/D+6.495\cdot\left(d/D\right)^2$$
Coefficient $ C_4 $
$$C_4=-44.576-7.428\cdot d/D+58.656\cdot\left(d/D\right)^2$$
The elastic stress concentration factor
$$K_t=C_1+C_2\cdot\left(\cfrac{2\cdot r}{D}\right)+C_3\cdot\left(\cfrac{2\cdot r}{D}\right)^2+C_4\cdot\left(\cfrac{2\cdot r}{D}\right)^3$$