<Dd> σ θ = σ l o n g = p (r + 0.2 t) 2 t E (\ displaystyle \ sigma _ (\ theta) = \ sigma _ (\ rm (long)) = (\ frac (p (r + 0.2 t)) (2tE))) </Dd> <P> Cylindrical shells: </P> <Dl> <Dd> σ θ = p (r + 0.6 t) t E (\ displaystyle \ sigma _ (\ theta) = (\ frac (p (r + 0.6 t)) (tE))) </Dd> <Dd> σ l o n g = p (r − 0.4 t) 2 t E (\ displaystyle \ sigma _ (\ rm (long)) = (\ frac (p (r - 0.4 t)) (2tE))) </Dd> </Dl> <Dd> σ θ = p (r + 0.6 t) t E (\ displaystyle \ sigma _ (\ theta) = (\ frac (p (r + 0.6 t)) (tE))) </Dd>

Determine the increase in the diameter of the pressure vessel