One U-notch in a member of rectangular section for elastic stress, axial tension
s_formulas_for_Stress_and_Strain/Stress_concentration_factors_for_elastic_stress_(TABLE_17(and46)1)/One U-notch in a member of rectangular section.svg "One_U-notch_in_a_member_of_rectangular_section")
Values for calculation
Calculation
Coefficient $ C_1 $
$$C_1=0.721+2.394\cdot\sqrt{h/r}-0.127\cdot h/r$$
Coefficient $ C_2 $
$$C_2=1.978-11.489\cdot\sqrt{h/r}+2.211\cdot h/r$$
Coefficient $ C_3 $
$$C_3=-4.413+18.751\cdot\sqrt{h/r}-4.596\cdot h/r$$
Coefficient $ C_4 $
$$C_4=2.714-9.655\cdot\sqrt{h/r}+2.512\cdot h/r$$
The elastic stress concentration factor
$$K_t=C_1+C_2\cdot\left(\cfrac{h}{D}\right)+C_3\cdot\left(\cfrac{h}{D}\right)^2+C_4\cdot\left(\cfrac{h}{D}\right)^3$$