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The Growth Rate of Semi-Elliptic Fatigue Cracks in Thick-Walled Cylinders

Published online by Cambridge University Press:  21 February 2011

W. A. Lees  and
P. S. J. Crofton
W. A. Lees
Affiliation:
Department of Mechanical Engineering, Imperial College of Science and Technology, London SW7 2BX
P. S. J. Crofton
Affiliation:
Department of Mechanical Engineering, Imperial College of Science and Technology, London SW7 2BX
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Abstract

The rate of growth of fatigue cracks originating at the bore and at the outside surface of thick-walled low alloy steel cylinders has been measured for cylinders subjected to fluctuating internal pressure.

Analysis of the results using linear elastic fracture mechanics relationships shows that crack growth rates found in air adequately predict the behaviour of cracks growing from the outside surface of a cylinder.

Fatigue cracks growing from the bore of a cylinder subjected to fluctuating internal pressure are found to advance at a consistently higher rate than that predicted from crack growth rate tests carried out in air.

These findings are discussed in relation to the proposed adoption of existent strain-life fatigue data for pressure vessel design.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 22: Symposium NY – High Pressure in Science and Technology , 1983 , 277
Copyright
Copyright © Materials Research Society 1984

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References

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