Premium
Elucidating the Mechanism of Fatigue Crack Acceleration Following the Occurrence of an Underload
Author(s) -
Salvati Enrico,
Sui Tan,
Zhang Hongjia,
Lunt Alexander J. G.,
Fong Kai Soon,
Song Xu,
Korsunsky Alexander M.
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600069
Subject(s) - materials science , crack closure , paris' law , structural engineering , acceleration , residual stress , cyclic stress , fatigue testing , synchrotron , compression (physics) , parametric statistics , composite material , fracture mechanics , engineering , mathematics , physics , statistics , classical mechanics , nuclear physics
Fatigue Crack Growth Rate (FCGR) is altered by a single anomalous load exceeding cyclic maximum (Overload) or compressive load below cyclic minimum (Underload). The authors study fatigue crack acceleration due to a single compressive Underload using residual stress mapping (by synchrotron XRD) and crack closure analysis (by DIC). The relative influence and duration of these two principal causes of FCGR alteration are revealed. Validated FEA model is used for parametric analysis of the effect of baseline cyclic loading ratio and magnitude of Underload on the cyclic J‐integral.