Analysis of dynamic fracture mechanisms in gas pipelines

Abstract There are many instances where the rapid propagation of cracks is the result of fluid pressure acting on piping structures. This problem is recognized as one of the most important issues of dynamic fracture mechanics. This paper addresses recent developments in this research area, and particularly describes the dynamic fracture mechanism and the applications of analysis methods to the rapid crack propagation RCP for gas pipelines. It also discusses the criteria for crack initiation, propagation and arrest. The pressure profile behind the crack tip, which is the main source of the crack driving force, is computed by combining linear decay approach. For the calculation of crack driving force G, the numerical implement using the nodal force release and the energy balance methods are described. A novel analysis methodology is also presented in this paper to investigate the suitability of crack arrestors.