CRACK GROWTH RESISTANCE AS TENACITY CRITERIA OF ELASTIC-PLASTIC FRACTURE MECHANICS

F. W. Neikes        

Anales de la Mecánica de la Fractura, nº 7 . 1990 . Pág. 140 -143
Ver (.pdf): Anales07-021

Resumen: The use of the aluminium alloy 7020 (A1Zn4,5Mgl) in highly stressed structures is analysed from a fracture mechanics approach regarding the prediction of limit states under monotonic loading. The description of the crack growth behaviour is based on tests with compact specimens and centre-cracked plates. The evaluation of crack resistance is based on ASTM E 813. Comparing the crack driving force with crack resistance it is possible to determine the tolerable crack length and loading at the point of initial crack propagation and to estímate the conditions of instability of specimens and structures.

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