Fluid Interaction with Fracture Propagation in Pipelines

An analysis of catastrophic pipeline fracture is given. The fluid mechanics and fracture mechanics of the system are mutually interdependent, but they are treated separately and then compared graphically by parameters essential to both processes. The pressure drop behind the crack opening is determined for both processes. The pressure drop behind the crack opening is determined for both liquids and gases, and from this information the energies of the crack system are determined. The relationship between the crack opening angle and length of pressurized crack system is plotted on the same chart as the opening angle and crack length relationship required for catastrophic failure. The intersection of these two relationships determines the failure point.