The crack stress-field parameter K and crack-extension force G at boundary points of a flat elliptical crack may be derived from knowledge that normal tension produces an ellipsoidal crack opening. Rough correction procedures can be employed to adapt this result for application to a part-through crack in a plate subjected to tension. Experimental measurements suggest this adapted result has a useful range of accuracy.
Crack-Extension Force for a Part-Through Crack in a Plate
G. R. Irwin
Mechanics Division, U. S. Naval Research Laboratory, Washington, D. C.
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Irwin, G. R. (December 1, 1962). "Crack-Extension Force for a Part-Through Crack in a Plate." ASME. J. Appl. Mech. December 1962; 29(4): 651–654. https://doi.org/10.1115/1.3640649
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