Bursting for fixed tubular and restrained hydroforming

The paper presents a failure analysis of tube hydroforming under a wide range of process conditions involving internal pressure, enclosed square die, and axial end feeding. The failure analysis focuses on the onset of critical bursting conditions. Bursting is an instability phenomenon of tube hydroforming, which fails to sustain any more internal pressure. Onset of bursting depends on a number of processing parameters such as pressure and end feeding, as well as on material properties. Several analytical analyses have been conducted to determine the onset of bursting conditions for different loading paths. The critical parameters governing the onset bursting conditions are examined and discussed.