Establishing K1c from eccentrically fatigue cracked small circumferentially grooved cylindrical specimens

R. N. Ibrahim, H. L. Stark

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The authors have earlier proposed a practical method of using a small cylindrical circumferentially notched and fatigue cracked specimen to measure K1c. This specimen has a machined "Vee" groove, from the root of which, is grown a fatigue crack using rotating bending. This specimen is then broken in tension and K1c thus established. In practice however a significant proportion of the final ligaments after fatigue cracking are eccentric and some are non-circular. Finite element analysis has been carried out on a spectrum of final ligament sizes and eccentricities, leading to a relationship for determining K1c from such eccentrically cracked specimens. The results using this relationship are compared with experimental data.

Original languageEnglish
Pages (from-to)179-188
Number of pages10
JournalInternational Journal of Fracture
Issue number3
Publication statusPublished - 1 Aug 1990
Externally publishedYes

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