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Front development of a long fatigue crack during its growth
Faculty
Not Specified
Year:
1997
Type of Publication:
Article
Pages:
849-862
Authors:
Sallam, HEM, HAMMOUDA, MMI, AHMAD, SSE, Seleem, MH
DOI:
10.1111/j.1460-2695.1997.tb01529.x
Journal:
FATIGUE \& FRACTURE OF ENGINEERING MATERIALS \& STRUCTURES BLACKWELL SCIENCE LTD
Volume:
20
Research Area:
Engineering; Materials Science
ISSN
ISI:A1997XH96700003
Keywords :
3-d stress analysis, crack tip profile, crack tip deformation, finite element method, fatigue crack growth, St 37/2 DIN 17100/1980
Abstract:
A 3-D elastic-plastic finite element analysis has been developed to simulate the deformation development along the front of a long mode I single edge crack in plates subjected to either monotonic or cyclic loading. Idealisations having both equal and unequal layers through the thickness of the plate were involved. Plane stress and plane strain 2-D finite element analyses were also performed and compared with the present 3-D solutions. The development of the monotonic and cyclic crack tip plastically deformed zones and opening displacements were traced and correlated to accommodate the effect of the plate thickness and the profile of the crack front. A previously developed crack tip deformation parameter was invoked to predict the effect of the specimen thickness on mode I fatigue crack growth and the associated change of crack front profile. Comparison of such a prediction and the experimental findings of the present work reflected the capability of that parameter in modelling fatigue crack growth through the plate thickness.
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