Fig. 3

Pressure P vs \({\displaystyle \frac{a}{A}}\). Dotted line: No bending stiffness. Line: Bending stiffness present. Red: \({\displaystyle \frac{\dot{a}}{A}}=0\)/s. Green: \({\displaystyle \frac{\dot{a}}{A}}=0.1\)/s. Blue: \({\displaystyle \frac{\dot{a}}{A}}=0.2\)/s.