List of symbols
| Symbol | Name of the symbol | Unit |
|---|---|---|
| $A$ | profile area | $\mathrm{mm^2}$ |
| $B$ | coefficient $ B $ | $\mathrm{}$ |
| $B_1$ | coefficient $ B_1 $ | $\mathrm{}$ |
| $B_2$ | coefficient $ B_2 $ | $\mathrm{}$ |
| $B_3$ | coefficient $ B_3 $ | $\mathrm{}$ |
| $B_4$ | coefficient $ B_4 $ | $\mathrm{}$ |
| $B_M$ | coefficient $ B_M $ | $\mathrm{}$ |
| $B_N$ | coefficient $ B_N $ | $\mathrm{}$ |
| $C$ | coefficient $ C $ | $\mathrm{}$ |
| $C_1$ | coefficient $ C_1 $ | $\mathrm{}$ |
| $C_2$ | coefficient $ C_2 $ | $\mathrm{}$ |
| $C_3$ | coefficient $ C_3 $ | $\mathrm{}$ |
| $C_4$ | coefficient $ C_4 $ | $\mathrm{}$ |
| $D$ | outer diameter | $\mathrm{mm}$ |
| $D$ | diameter of largest inscribed circle | $\mathrm{mm}$ |
| $F$ | coefficient $ F $ | $\mathrm{}$ |
| $G$ | modulus of rigidity | $\mathrm{MPa}$ |
| $I_x$ | moment of inertia about axis of symmetry | $\mathrm{mm^4}$ |
| $J$ | polar moment of inertia about centroid axis | $\mathrm{mm^4}$ |
| $K$ | polar moment of inertia | $\mathrm{mm^4}$ |
| $K_1$ | polar moment of inertia coefficient $ K_1 $ | $\mathrm{mm^4}$ |
| $K_2$ | polar moment of inertia coefficient $ K_2 $ | $\mathrm{mm^4}$ |
| $L$ | length | $\mathrm{mm}$ |
| $T$ | twisting moment | $\mathrm{Nm}$ |
| $U$ | length of median boundary | $\mathrm{mm}$ |
| $U$ | dimension $ U $ | $\mathrm{mm}$ |
| $V_L$ | coefficient $ V_L $ | $\mathrm{}$ |
| $V_s$ | coefficient $ V_s $ | $\mathrm{}$ |
| $W$ | dimension $ W $ | $\mathrm{mm}$ |
| $a$ | dimension $ a $ | $\mathrm{mm}$ |
| $a_0$ | dimension $ a_0 $ | $\mathrm{mm}$ |
| $b$ | dimension $ b $ | $\mathrm{mm}$ |
| $b_0$ | dimension $ b_0 $ | $\mathrm{mm}$ |
| $c$ | dimension $ c $ | $\mathrm{mm}$ |
| $d$ | inner diameter | $\mathrm{mm}$ |
| $d$ | dimension $ d $ | $\mathrm{mm}$ |
| $e$ | eccentricity | $\mathrm{mm}$ |
| $h$ | height of the segment | $\mathrm{mm}$ |
| $h$ | dimension $ h $ | $\mathrm{mm}$ |
| $m$ | dimension $ m $ | $\mathrm{mm}$ |
| $n$ | coefficient $ n $ | $\mathrm{}$ |
| $n$ | dimension $ n $ | $\mathrm{mm}$ |
| $q$ | coefficient $ q $ | $\mathrm{}$ |
| $r$ | radius | $\mathrm{mm}$ |
| $r$ | radius of curvature of boundary at the point | $\mathrm{mm}$ |
| $r_i$ | inner radius | $\mathrm{mm}$ |
| $r_o$ | outer radius | $\mathrm{mm}$ |
| $s$ | coefficient $ s $ | $\mathrm{}$ |
| $s$ | dimension $ s $ | $\mathrm{mm}$ |
| $t$ | dimension $ t $ | $\mathrm{mm}$ |
| $t$ | thickness normal to median line | $\mathrm{mm}$ |
| $t_1$ | dimension $ t_1 $ | $\mathrm{mm}$ |
| $α$ | angle | $\mathrm{°}$ |
| $α$ | coefficient $ α $ | $\mathrm{}$ |
| $θ$ | angle of twist | $\mathrm{rad}$ |
| $λ$ | coefficient $ λ $ | $\mathrm{}$ |
| $τ_{average-a}$ | torsion stress (average) dimension $ a $ | $\mathrm{MPa}$ |
| $τ_{average-b}$ | torsion stress (average) dimension $ b $ | $\mathrm{MPa}$ |
| $τ_{average}$ | torsion stress (average) | $\mathrm{MPa}$ |
| $τ_{max-at-M}$ | torsion stress at $ M $ | $\mathrm{MPa}$ |
| $τ_{max-at-N}$ | torsion stress at $ N $ | $\mathrm{MPa}$ |
| $τ_{max}$ | torsion stress | $\mathrm{MPa}$ |
| $ϕ$ | a positive angle through which a tangent to the boundary rotates in turning or traveling around the reentrant portion | $\mathrm{rad}$ |