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A numerical investigation on the effect of an overload on fatigue crack opening and closure behaviour
Author(s) -
Ellyin F.,
Wu J.
Publication year - 1999
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.1460-2695.1999.00223.x
Subject(s) - crack closure , materials science , closure (psychology) , structural engineering , fatigue testing , composite material , mechanics , forensic engineering , fracture mechanics , engineering , physics , economics , market economy
The effect of a superimposed single tensile overload or a compressive overload in a block of constant‐amplitude cycles on the crack opening and closing stresses is investigated using an elastic–plastic finite element analysis. The results obtained are in basic agreement with the experimental observations. Following an applied tensile overload cycle, the crack opening and closing stresses increase instantaneously, while the imposition of a compressive overload cycle results in a small decrease of the crack opening and closing stresses. A detailed discussion of the residual stress and strain patterns caused by the plastic deformation during the overload cycle and the corresponding crack profiles is included. The main governing mechanism resulting in the change of crack growth due to an overload is pointed out.