2013
DOI: 10.1016/j.ijfatigue.2012.01.003
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Ratchetting strain as a driving force for fatigue crack growth

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Cited by 53 publications
(26 citation statements)
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“…Here, two parameters, namely the accumulated inelastic strain and oxygen concentration, were used to represent the viscoplastic deformation and the oxidation effect, respectively. The accumulated inelastic strain, highly localised to the crack tip [27,37], has been successfully used to predict crack growth rate in vacuum (without oxidation) [52,53]. The idea proposed here is to use the two parameters to construct a failure curve from which crack growth prediction under fatigue-oxidation may be made.…”
Section: Failure Curvementioning
confidence: 99%
“…Here, two parameters, namely the accumulated inelastic strain and oxygen concentration, were used to represent the viscoplastic deformation and the oxidation effect, respectively. The accumulated inelastic strain, highly localised to the crack tip [27,37], has been successfully used to predict crack growth rate in vacuum (without oxidation) [52,53]. The idea proposed here is to use the two parameters to construct a failure curve from which crack growth prediction under fatigue-oxidation may be made.…”
Section: Failure Curvementioning
confidence: 99%
“…Progressive accumulation of strain was found in a compact tension (CT) specimen under cyclic loading conditions. Further extensive modelling work has since been carried out using a number of constitutive modelling tools, including visco-plasticity [8][9][10], crystal-plasticity [10,11] and Discrete Dislocation Dynamics [12], in both two and three dimensions, selected materials (nickel alloys, titanium alloy), specimen geometries (CT, single edge notch tension and 3D aerofoil specimen) and temperatures (room temperature, 300, 650°C) and at variable loading conditions. Encouragingly, strain ratchetting was found common in all the cases examined.…”
Section: Introductionmentioning
confidence: 99%
“…Usually, wheel fatigue failure modes are divided into three failure types that correspond with different initiation locations: surface, sub-surface and deep-surface [10,11]. With surfaceinitiated cracks, one of the damage mechanisms is called ratchetting [12,13] and typically occurs on the surface layers of wheels. The main causes of surface ratchetting are high friction loads that act parallel to the surface.…”
Section: Introductionmentioning
confidence: 99%