Journal
THEORETICAL AND APPLIED FRACTURE MECHANICS
Volume 78, Issue -, Pages 1-7Publisher
ELSEVIER
DOI: 10.1016/j.tafmec.2015.06.001
Keywords
Multiple cracks; Short cracks; Fatigue crack growth; Experimental data; Life prediction
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Although methods for predicting the growth and coalescence of cracks have been introduced, uncertainties persist in structures with multiple short cracks. Quantitative fractographic methods were used to study the way in which multiple short cracks in AA7050-T7451 of varying sizes on the same and on different planes grew under low amplitude cyclic loading. The accuracy of existing theoretical methods for predicting the growth and coalescence of multiple cracks was evaluated. Experimental results corroborate the findings that growth of the 'largest' crack dominated the fatigue life of a specimen with very little influence from relatively shorter cracks. (C) 2015 Elsevier Ltd. All rights reserved.
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