Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

McCarthy, Oliver J.; McGarry, J. Patrick; Leen, Seán B.

doi:10.1016/j.ijfatigue.2013.04.019

Cited by 48 publications

(22 citation statements)

References 31 publications

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“…In the context of fretting, McCarthy et al [15] found reasonable agreement between experimentally measured fretting fatigue lives and computationally predicted lives using . McCarthy et al [24] also highlighted the capability of accumulated plastic slip for prediction of wear in CP fretting models without the need for a user-defined wear rate. Accumulated plastic slip is calculated using the velocity gradient p :…”

Section: Fatigue Crack Initiationmentioning

confidence: 99%

Statistical grain size effects in fretting crack initiation

Ashton

Harte

Leen

2017

Tribology International

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A crystal plasticity computational framework is developed and validated to investigate the microstructure sensitivity of crack initiation in fretting. Randomly distributed microstructure geometries are incorporated into a partial-slip finite element fretting model. The number of cycles to fretting crack initiation is shown to be sensitive to average grain size and microstructure morphology. Scatter in the number of cycles to crack initiation is shown to increase as the number of grains across the contact width decreases due to statistical size effects. Average number of cycles to crack initiation is shown to increase with decreasing number of grains in the contact. Microstructure morphology is shown to have a negligible influence on the effect of stroke for the partial slip cases considered here.

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Section: Fatigue Crack Initiationmentioning

confidence: 99%

Statistical grain size effects in fretting crack initiation

Ashton

Harte

Leen

2017

Tribology International

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“…It has been previously presented by the authors [17,18], but is briefly outlined here for completeness, particularly for definition of the key constitutive parameters. Plastic slip is assumed to obey Schmidt's law [22], where the rate of plastic shear strain, _ γ α , for a particular slip system, α, is assumed to depend on the resolved shear stress, τ α , through the following power law:…”

Section: Crystal Plasticity Calibrationmentioning

confidence: 99%

The effect of grain orientation on fretting fatigue plasticity and life prediction

McCarthy

McGarry

Leen

2014

Tribology International

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a b s t r a c tA study on crystal and J 2 plasticity prediction of fretting fatigue is presented, using a microstructuresensitive fatigue parameter for crystal plasticity crack nucleation and a critical-plane (multiaxial) fatigue parameter for J 2 plasticity. A short crack propagation methodology is also implemented. The effect of grain orientation on nucleation life is shown to be significant for fretting fatigue. J 2 plasticity generally predicts conservative lives. Crystal plasticity is superior in terms of (i) accuracy of life prediction, (ii) ability to facilitate wear prediction and (iii) capturing the key effects of substrate fatigue stress and grain orientation on life. The crystal plasticity model facilitates new insight into interaction between grain orientation, fatigue stress amplitude and fretting surface damage vis-à-vis fretting fatigue life.

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“…The key advantage of the method was the prediction capability of crack initiation location and scatter in the fatigue life. McCarthy et al [23][24][25] used the same FIP in the case of fretting fatigue of stainless steel 316L. The rate of accumulated plastic slip _ p can be calculated by the following equation:…”

Section: Fatigue Indicator Parametermentioning

confidence: 99%

Investigation of microstructure effect on fretting fatigue crack initiation using crystal plasticity

Minaii

Farrahi

Karimpour

et al. 2018

Fatigue Fract Eng Mat Struct

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The onset of fretting fatigue is characterized by material microstructural changes in which the extent of the damage is comparable to grain size, and hence, the microstructure characteristics could have a significant effect on fatigue crack initiation. In this paper, a three‐dimensional finite element crystal plasticity framework is presented for simulation of the fretting fatigue. Controlled Poisson Voronoi tessellation (CPVT) method is employed to generate the polycrystalline region. In the CPVT method, regularity parameter controls the shape of grains. In this study, the impact of grain size and regularity parameter on crack initiation life and initiation site has been investigated. Cumulative plastic slip was used as a parameter of microstructure‐sensitive fatigue indicator. This parameter could effectively predict the location of crack initiation and its life. The results show that regularity parameter has a significant effect on the location of crack initiation. Furthermore, the effect of grain size on the fretting fatigue life of 316L stainless steel was investigated experimentally through testing different specimens with different grain sizes, to validate the simulation results.

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Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

Cited by 48 publications

References 31 publications

Statistical grain size effects in fretting crack initiation

Statistical grain size effects in fretting crack initiation

The effect of grain orientation on fretting fatigue plasticity and life prediction

Investigation of microstructure effect on fretting fatigue crack initiation using crystal plasticity

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