Prediction of Critical Crack Size in Plastically Strained Welded Panels

JDG Sumpter

doi:10.1520/STP27721S

SYMPOSIA PAPER Published: 01 January 1988

STP27721S

Prediction of Critical Crack Size in Plastically Strained Welded Panels

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Fracture toughness data for two HY80 weld metals are used to illustrate the application of J_c as a fracture analysis parameter in a form analogous to that developed in the United Kingdom for critical crack-tip opening displacement, _c, testing and analysis. J_c results from dynamically tested, shallow-surface-notched, welded bend specimens are shown to correlate well with the crack size and plastic strain levels required to initiate unstable fracture in fatigue-cracked Pellini bulge explosion test panels. J_c is shown to be a clear function of crack depth for shallow cracks in bending. The use of J_c data from conventional deeply notched bend specimens results in very conservative critical crack size predictions.

Author Information

Sumpter, JDG

Admiralty Research Establishment, Dunfermline, Scotland

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Details

Developed by Committee: E08

Pages: 415–432

DOI: 10.1520/STP27721S

ISBN-EB: 978-0-8031-5064-5

ISBN-13: 978-0-8031-1258-2

Prediction of Critical Crack Size in Plastically Strained Welded Panels

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