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Fractographic reconstitution of fatigue crack history – Part I
Author(s) -
NEDBAL I.,
SIEGL J.,
KUNZ J.,
LAUSCHMANN H.
Publication year - 2008
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 - 10.1111/j.1460-2695.2007.01211.x
Subject(s) - fractography , striation , paris' law , materials science , structural engineering , fatigue testing , scale effects , fracture mechanics , characterization (materials science) , crack closure , forensic engineering , scale (ratio) , composite material , engineering , physics , quantum mechanics , nanotechnology
Quantitative fractography of components which have failed under cyclic loading can offer very valuable information usually unattainable by any other means – in particular, a detailed description of fatigue crack growth (FCG) in space and in time. The reliable characterization of crack propagation provides data important in engineering applications. The main source of information on the relationship between fractographic findings and macroscopic crack growth rate (CGR) is striation spacing. This quantitative microfractographic characteristic was the basis for the methods described in the paper. An application of the fractographic reconstitution of FCG is illustrated by an example of an aircraft wing spar fatigued during a full‐scale test.