Journal Published Online: 01 January 1988
Volume 16, Issue 1

A Cleavage Precracking Technique for Sheet Steel Fracture Specimens



A technique is described for the preparation of sheet steel fracture specimens containing a cleavage precrack instead of the usual fatigue precrack. Since the cleavage precrack can provide a high level of stress concentration and is free from cyclic-loading damage, such specimens are useful in the investigation of various fracture processes and mechanisms. The production technique involves low-temperature biaxial loading of a specimen blank to produce a cleavage crack extension, then separation of the specimen from the blank by electrical-discharge-machining (EDM). The stresses used to control the cracking are analyzed and discussed.

Author Information

Clayton, JQ
Aeronautical Research Laboratories, G.P.O. Melbourne, Australia
Rogers, CB
Aeronautical Research Laboratories, G.P.O. Melbourne, Australia
Pages: 5
Price: $25.00
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Stock #: JTE11049J
ISSN: 0090-3973
DOI: 10.1520/JTE11049J