SEDL / STP / STP627-EB / STP27386S

Dynamic Finite Difference Analysis of an Axially Cracked Pressurized Pipe Undergoing Large Deformations

Emery, AF
Professors of mechanical engineering, University of Washington, Seattle, Wash.

Love, WJ
Professors of mechanical engineering, University of Washington, Seattle, Wash.

Kobayashi, AS
Professors of mechanical engineering, University of Washington, Seattle, Wash.

Pages: 17    Published: Jan 1977

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Abstract

An axial through crack was suddenly introduced into the wall of a pipe which was pressurized by either hot water or air. The crack tip was assumed to advance along the pipe according to a fracture criterion based upon the character of the deformation. For brittle elastic failure a maximum stress intensity factor was utilized, while for a plastic stress field, a maximum strain criterion was used. The fluid pressure in the pipe was calculated by a finite difference method in which the effect of the outflow through the crack was taken into consideration.