Radial Displacement Thin-wall Section (Closed Ended)

Radial Displacement Thin-wall Section (Closed Ended) Formula
$\Delta_r \;=\; \dfrac{ p \cdot r^2 }{ \lambda \cdot t } \cdot \left( 1 - \dfrac{ \mu }{ 2 } \right)$
Symbol	English	Metric
$\Delta_r$ = Radius Change	$in$	$mm$
$p$ = Pressure Under Consideration	$lbf\;/\;in^2$	$Pa$
$r$ = Radius to Point of Intrest	$in$	$mm$
$\lambda$ (Greek symbol lambda) = Elastic Modulus	$lbf\;/\;in^2$	$Pa$
$t$ = Wall Thickness	$in$	$mm$
$\mu$ (Greek symbol mu) = Poisson's Ratio	$dimensionless$	$dimensionless$