Abstract
This focuses on the development of a theoretical model for unstable crack propagation and crack arrest in a pressurized pipeline is extended in this paper by including the effect of backfill. The approach being developed involves four essential aspects of crack propagation in pipelines. These four components of the problem are, (1) a shell theory characterization of the dynamic deformation of a pipe with a plastic yield-hinge behind an axially propagating crack, (2) a fluid-mechanics treatment of the axial variations in the gas pressure acting on the pipe walls, (3) an energy-based dynamic fracture mechanics formulation for the crack-driving force, and (4) measured values of the dynamic energy absorption rate for pipeline steels.
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