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Fatigue crack growth threshold conditions at notches. Part I: theory
Author(s) -
C. Vallellano,
A. Navarro,
Domínguez
Publication year - 2000
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.2000.00257.x
Subject(s) - materials science , crack closure , fatigue limit , fracture mechanics , limit (mathematics) , structural engineering , slip (aerodynamics) , lüders band , stress concentration , grain boundary , fatigue testing , paris' law , mechanics , composite material , engineering , physics , mathematics , mathematical analysis , microstructure , thermodynamics
A micromechanical description of the fatigue crack growth process at notches is presented. Crack interaction with the plastic slip barriers of the material (e.g. grain boundaries) and the influence of the notch stress gradient are intrinsically taken into account in the model. Both the notch fatigue crack initiation limit and the limit for propagation up to failure (i.e. the conventional notch fatigue limit) are clearly identified and calculated. The formation of non‐propagating cracks is also explained.