Dynamic Collapse Analysis for Pressurized Pipes Containing Axial Through-Wall Cracks
Collapse of a pressurized pipe with an axially long and through-wall crack, subjected to a bending moment from jet force, is investigated using two approaches: (1) A preliminary calculation, in which a net section stress collapse approximation is applied to an inflated pipe section where a crack opens due to Tada’s formula. (2) Fully three-dimensional nonlinear finite element analysis which simulates the dynamic collapse behavior of the pipe. In this analysis an additional pressure load equivalent to the reaction upon the jet force is used, and the magnitude of the pressure is dependent on the crack opening area.
KeywordsCrack Length Internal Pressure Plastic Collapse Circumferential Crack Pressurize Pipe
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