Three-dimensional simulation of fretting crack nucleation and growth

On the Fatigue and Fracture of Bladed and Integrally Bladed Rotors of Aircraft Engine Compressors

“…Further adding to this distinction, cracks nucleating from fretting fatigue typically grow normal to the contact surface and exist in elastic stress fields [13]. Thus, modeling techniques based on the fundamentals of LEFM have been previously used [8], [18] to successfully simulate crack growth for fretting fatigue applications.…”

“…The 'θ' and 'r' are the polar coordinates for angular and radial locations measured from the crack tip. For Mode I loading, in a 'K-dominated' region, the stress field in any linear elastic isotropic cracked body can be expressed through (18), where f ij (θ) is determined through complex stress functions depending on the geometry of the structure. In the equation, the leading term is dominant, and as such the stresses are proportional to 1/√r close to the crack tip in the singularity dominated zone.…”

Scopus as a Meta-Source of Knowledge About Turbine Blade Damage in the Aspect of Designing an Expert Diagnostic System

“…Operator LIMIT-TO z opcją EXACTKEYWORD ogranicza przeszukiwanie do publikacji opisanych wybranym słowem kluczowym. Przedstawiona wyżej przykładowa kwerenda obejmuje podstawowe przyczyny uszkodzeń łopatek turbin:  korozja (corrosion) [19,20,31,33,37] …;  pęknięcia (cracks) [1,2,13,24,25] …;  pełzanie (creep) [29,30,32,34] …;  erozja (erosion) [14,21,28,40] …;  zmęczenie (fatigue) [15,16,18,22] …; oraz metody badawcze:  badania eksperymentalne (experimental investigations) [12,15,23,38] …;  analiza uszkodzeń (failure analysis) [24,26,27,36] …;  badania nieniszczące (nondestructive examination) [4,17,35] … W zależności od liczności zbioru wyszukanych publikacji dalsza analiza może być przeprowadzona przez eksperta bezpośrednio lub z wykorzystaniem aplikacji bibliograficznych (np. Mendeley lub EndNote).…”

Fretting fatigue tests on shrink-fit specimens and investigations into the strength enhancement induced by deep rolling

“…Fretting testing is essential in designing admissible loads and also to validate different modelling approaches. Experimental fretting tests can be classified into: (1) full or small scale replication of the actual fretting configuration, as experienced by the in-service component, and (2) idealised test layout where the contact is accurately controlled [12,13]. Examples of component testing have been presented by Golden et al [4,14] regarding the dovetail interface, by Bertini et al [9] and Alfredsson [10] regarding shrink-fit connection, and Azevedo et al [15] regarding cable clamping, as well as others for different applications.…”

“…Examples of fretting fatigue include the dovetail interface of turbomachinery [1][2][3][4] and the shrink-fit (tubular or cylindrical) connection [5][6][7][8][9][10][11]. Fretting testing is essential in designing admissible loads and also to validate different modelling approaches.…”