Study on the propagating shear fracture in high strength line pipes by partial-gas burst test

In this paper, for the purpose of investigation on quantitative correlation between the partial-gas burst tests and the full-scale burst tests as a fi rst step of establishing the evaluating method of crack arrestability in pi pelines from partial-gas burst test results, the effects of the differences in test conditions on crack propagation behavior between both tests were e valuated. The partial-gas burst tests using high strength X80 pipes were ca rried out six limes with varied gas ratio and failure pressure. The test re sults indicated that the crack propagation is much influenced by not only t he failure pressure but also the gas ratio. After evaluation of the differe nces between the partial-gas burst tests and the full-scale burst tests, th e simulating method of the propagating shear fracture in partial-gas burst tests were proposed. The crack propagation of the partial-gas burst tests w as well simulated by this method and good agreement between the experimenta l data and the simulated results was obtained.