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Cross-sectional area of armour bedding

Symbol
$A_{ab}$
Unit
mm$^2$
Formulae
$n_c D_{shj}+\left(D_{shj}+t_{ab}\right) \pi t_{ab}$Multi-core cables, without filler (duplex/triplex)
$\frac{\pi}{4} \left({D_{ab}}^2-\left(D_{ab}-t_{ab}\right)^2\right)$otherwise
Related
$D_{ab}$
Diameter over armour bedding [mm]
$D_{shj}$
Diameter of sheath jacket [mm]
$n_c$
Number of conductors in object
$\pi$
Archimedes' constant $\pi$
$t_{ab}$
Thickness of armour bedding [mm]
Used in
$m_{ab}$
Mass of armour bedding [kg/m]
$Q_{ab}$
Thermal capacitance of armour bedding [J/(m.K)]