Effect of Size on the Fracture Criterion

I Milne; GG Chell

doi:10.1520/STP35839S

SYMPOSIA PAPER Published: 01 January 1979

STP35839S

Effect of Size on the Fracture Criterion

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Experimental evidence showing the size dependence of J_Ic in ferritic steels is presented. This behavior is described in terms of a relatively simple mechanistic model for cleavage fracture. It is shown that the mechanisms of cleavage fracture and ductile slow crack growth are always in competition and this leads to the behavior frequently encountered in fracture tests where initially ductile crack extension leads to fast brittle failure. The size effect is also discussed in terms of a shift in the ductile brittle transition temperature. The implications on failure assessment procedures are mentioned.

Author Information

Milne, I

Central Electricity Research Laboratories, Leatherhead, Surrey, U.K.

Chell, GG

Central Electricity Research Laboratories, Leatherhead, Surrey, U.K.

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Details

Developed by Committee: E08

Pages: 358–377

DOI: 10.1520/STP35839S

ISBN-EB: 978-0-8031-4739-3

ISBN-13: 978-0-8031-0330-6

Effect of Size on the Fracture Criterion

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