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Elastic-plastic analysis of small defects—voids and inclusions

✍ Scribed by G.G. Trantina; M. Barishpolsky

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
861 KB
Volume
20
Category
Article
ISSN
0013-7944

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✦ Synopsis

Elastic-plastic finite element analyses are used to compute the crack driving force for cracks initiating at voids and inclusions. For a wide variety of crack/defect geometries, a simple relationship in terms of a strain intensity factor can be used to charaterize the crack driving force for applied strains of less than about 1%. As compared to a void, the crack driving force for a bonded, cracked inclusion is 15% higher and the crack driving force for an unbonded inclusion is 10% lower. These results are combined with an expression for the crack growth rate behavior to predict the effect of defect structure on fatigue behavior.

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