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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

1. Irwin, G. R. and Kies, J. A. Fracturing and Fracture Dynamics. Welding Journal, Vol. 31, Research Supplement, February 1952.Google Scholar
2. Mcevily, A. J., Illg, W. and Hardrath, H. F. Static Strength of Aluminum Alloy Specimens Containing Fatigue Cracks. N.A.C.A. T.N. 3816, 1956.Google Scholar
3. Williams, D. Crack Propagation Properties of Thin Sheet—Some Recent Results and Their Impact on Design. A.R.C. Current Paper 564, 1961.Google Scholar
4. Fracture Testing of High-Strength Sheet Materials. Report of A.S.T.M. Committee, Bulletin of the American Society for Testing Materials, January and February 1960.Google Scholar
5. Dixon, J. R. Stress Distribution Around a Central Crack in a Plate Loaded in Tension; Effect of Finite Width of Plate. Journal of the Royal Aeronautical Society, March 1960.Google Scholar
6. Royal Aeronautical Society Structures Data Sheets, Vol. 1.Google Scholar
7. Bristol Aircraft Ltd. An Experimental Investigation into the Crack Propagation Characteristics of Sheet Materials used in Aircraft Construction. Engineering Laboratory Report 2/335/1 (Unpublished, 1959).Google Scholar
8. Sanders, J. L. Effect of a Stringer on the Stress Concentration Due to a Crack in a Thin Sheet. N.A.C.A. T.N. 4207, 1957.Google Scholar
9. Romualdi, J. P., Frasier, J. T. and Irwin, G. R. Crack Extension Force Near a Riveted Stiffener. Naval Research Laboratory (Washington) Memorandum Report 4956, 1957.Google Scholar
10. Illg, W. and Mcevily, A. J. Static Strength of Cross-Grain 7075-T6 Aluminum Alloy Extruded Bar Containing Fatigue Cracks. N.A.C.A. T.N. 3994, 1957.Google Scholar