List of symbols

Symbol	Name of the symbol	Unit
$C_1$	coefficient $ C_1 $	$\mathrm{}$
$C_2$	coefficient $ C_2 $	$\mathrm{}$
$C_3$	coefficient $ C_3 $	$\mathrm{}$
$C_4$	coefficient $ C_4 $	$\mathrm{}$
$D$	diameter, larger diameter	$\mathrm{mm}$
$H$	width, larger width	$\mathrm{mm}$
$K_{tg}$	stress concentration factor with the nominal stress based on gross area	$\mathrm{ }$
$K_{tn}$	stress concentration factor with the nominal stress based on net area	$\mathrm{ }$
$K_{ts}$	stress concentration factor for shear stress	$\mathrm{ }$
$M$	moment	$\mathrm{Nm}$
$P$	load, force	$\mathrm{N}$
$T$	torque	$\mathrm{Nm}$
$a$	width of a notch or semimajor axis of an ellipse	$\mathrm{mm}$
$b$	distance between notch centers or semiminor axis of an ellipse	$\mathrm{mm}$
$d$	diameter	$\mathrm{mm}$
$d$	width	$\mathrm{mm}$
$h$	thickness	$\mathrm{mm}$
$r$	radius of curvature of hole, arc, notch	$\mathrm{mm}$
$t$	depth of groove, notch	$\mathrm{mm}$
$σ$	normal stress	$\mathrm{MPa}$
$σ_{max}$	maximum normal stress	$\mathrm{MPa}$
$σ_{nom}$	nominal or reference normal stress	$\mathrm{MPa}$
$τ_{max}$	maximum shear stress	$\mathrm{MPa}$
$τ_{nom}$	nominal or reference shear stress	$\mathrm{MPa}$