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The Correlation of Unstable Crack Length Data for Sheet Materials

Published online by Cambridge University Press:  07 June 2016

E. R. Welbourne
E. R. Welbourne*
Affiliation:
Technical Department, Royal Aeronautical Society
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Summary

A semi-empirical analysis of unstable crack propagation in thin sheets is given. An effective value of the crack tip strain concentration factor is used as the criterion for instability. Good correlation is achieved with experimental results from unreinforced sheets of aluminium and titanium alloys and high-strength steels. The interdependence of geometry and stressstrain curve properties in determining the unstable crack propagation characteristics of sheet materials is illustrated in an appendix.

Type
Research Article
Information
Aeronautical Quarterly , Volume 12 , Issue 4 , November 1961 , pp. 395 - 408
Copyright
Copyright © Royal Aeronautical Society. 1961

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References

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