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Stress intensity factors and crack propagation in a single crystal nickel-based superalloy

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Stress intensity factors and crack propagation in a single crystal nickel-based superalloy

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Samenvatting

A three-dimensional finite element method was used to calculate the stress intensity factors for corner cracked specimens of a single crystal nickel-based superalloy. The anisotropic material properties and inclinations of the cracks were shown to have significant effects on the stress intensities. Then the two-dimensional resolved shear stress approach for predicting the crack planes and crack growth directions in single crystals was extended to the three-dimensional case. Using this approach, the fatigue crack growth behaviour in single crystal corner cracked specimens could be explained.

Trefwoorden
OrganisatieMinisterie van Defensie - NLDA
Gepubliceerd inEngineering Fracture Mechanics Elsevier Science, Vol. 73, Pagina's: 1679-1692
Jaar2006
TypeArtikel
TaalEngels

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