Welding Institute Research on the Fatigue Precracking of Fracture Toughness Specimens

OL Towers; MG Dawes

doi:10.1520/STP34516S

SYMPOSIA PAPER Published: 01 January 1985

STP34516S

Welding Institute Research on the Fatigue Precracking of Fracture Toughness Specimens

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Three techniques are described for growing uniform fatigue cracks in fracture toughness specimens originally containing welding residual stresses. These are local compression, reverse bending, and the use of a high R-ratio in the fatigue cycle. The possible effects of the techniques on the subsequent measurements of fracture toughness are assessed. The relative merits of the three techniques are summarized, and the main conclusion reached is that local compression is the best defined technique at present, and that reverse bending and high R-ratio, although probably more convenient, require further research and development.

Author Information

Towers, OL

Rolls-Royce Ltd., Derby, Cambridge, England

Dawes, MG

Rolls-Royce Ltd., Derby, Cambridge, England

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Details

Developed by Committee: E08

Pages: 23–46

DOI: 10.1520/STP34516S

ISBN-EB: 978-0-8031-4923-6

ISBN-13: 978-0-8031-0419-8

Welding Institute Research on the Fatigue Precracking of Fracture Toughness Specimens

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