List of symbols

Symbol Name of the symbol Unit
$C_E$ material coefficient $\mathrm{\cfrac{1}{MPa}}$
$D_1$ sphere diameter $ D_1 $ $\mathrm{mm}$
$D_1$ diameter of spherical socket $\mathrm{mm}$
$D_1$ cylinder diameter $ D_1 $ $\mathrm{mm}$
$D_1$ diameter of cylindrical socket $\mathrm{mm}$
$D_2$ sphere diameter $ D_2 $ $\mathrm{mm}$
$D_2$ cylinder diameter $ D_2 $ $\mathrm{mm}$
$E_1$ modulus of elasticity to bodie 1 $\mathrm{MPa}$
$E_2$ modulus of elasticity to bodie 2 $\mathrm{MPa}$
$K_D$ dimensional coefficient $\mathrm{mm}$
$L$ length $\mathrm{mm}$
$P$ total load $\mathrm{N}$
$a$ radius of circular contact area $\mathrm{mm}$
$b$ width of rectangular contact area $\mathrm{mm}$
$c$ major semiaxis $\mathrm{mm}$
$d$ minor semiaxis of elliptical contact area $\mathrm{mm}$
$p$ load per unit length $\mathrm{N/mm}$
$y$ relative motion of approach along the axis of loading of two points, one in each of the two contact bodies, remote from the contact zone $\mathrm{mm}$
$α$ coefficient $ α $ $\mathrm{ }$
$β$ coefficient $ β $ $\mathrm{ }$
$γ$ coefficient $ γ $ $\mathrm{ }$
$ν_1$ Poisson's ratio to bodie 1 $\mathrm{ }$
$ν_2$ Poisson's ratio to bodie 2 $\mathrm{ }$
$σ_c$ contact stress $\mathrm{MPa}$