Crack propagation at constant load and room temperature in an extruded aluminium

H. L. Stark, R. N. Ibrahim

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The authors applied a constant tensile force to a range of small circumferentially notched and fatigue cracked specimens taken from an aluminium extrusion, subject of a number of industrial failures. Both specimens and failed pressure vessel components were manufactured from the same batch of 6351-T6 aluminium alloy extrusion. Each specimen was subjected to a different magnitude of constant load at room temperature; the initial applied K1 being less than K1c. It was found that the specimens broke after a period of time; relationships between the initial applied K1 and the time to failure, and crack growth rate emerged. SEM studies of the fracture surfaces indicated plane strain brittle fracture.

Original languageEnglish
Pages (from-to)409-414
Number of pages6
JournalEngineering Fracture Mechanics
Issue number3
Publication statusPublished - 1 Jan 1988
Externally publishedYes

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