SYMPOSIA PAPER Published: 01 January 1979
STP35839S

Effect of Size on the Fracture Criterion

Source

Experimental evidence showing the size dependence of JIc 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