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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<jats:p>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.</jats:p>

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