Dynamic Expansion of an Open-Ended Tube

Abstract

The deformation mode of a thin tube subjected to an arbitrary time varying pressure pulse is in two phases: (i) during positive radial acceleration a zone of zero axial strain sweeps outwards from the central plane toward the ends; (ii) on deceleration to rest, the plane strain zone vanishes, the axial stress changes sign, and the stress ratio is then unconstrained. The final tube profile is essentially uniform except near the ends, and the final change in length is small.