Imperial College London
Alternate

ProfessorFionnDunne

Faculty of Engineering, Department of Materials

Principal Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 2884fionn.dunne

 
 
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Location

 

104Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cuddihy:2017:10.1016/j.ijfatigue.2016.11.034,
author = {Cuddihy, MA and Stapleton, A and Williams, SJ and Dunne, FPE},
doi = {10.1016/j.ijfatigue.2016.11.034},
journal = {International Journal of Fatigue},
pages = {177--189},
title = {On cold dwell facet fatigue in titanium alloy aero-engine components},
url = {http://dx.doi.org/10.1016/j.ijfatigue.2016.11.034},
volume = {97},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper investigates the mechanisms of facet nucleation through combining aero-engine manufacturer disc component test data with microstructure-sensitive crystal plasticity finite element (CPFE) models. Full-scale component testing has been carried out in a manner representative of in-service conditions. Elastic FE analyses of discs under these conditions and fully accounting for thermal and residual processing strains have also been carried out. Disc facet nucleation sites have been identified and the local stress states evaluated in order to establish crystal plasticity oligocrystal sub-models. The oligocrystal RVE models provide knowledge of hard-soft grain stresses under dwell loading, and the consequent load shedding in order to provide stresses required for the facet nucleation.The disc component facet observations together with the crystal plasticity sub-model oligocrystal approach provide persuasive evidence that a hard-soft grain combination is required for facet formation, that the remote stress state influences the resolved shear stress on the soft grain initiating slip (with tensile uniaxial stress state more damaging than a tension-tension biaxial stress state), and that the load shedding which results is essential in pushing up the hard-grain basal stress to nucleate facets.
AU  - Cuddihy,MA
AU  - Stapleton,A
AU  - Williams,SJ
AU  - Dunne,FPE
DO  - 10.1016/j.ijfatigue.2016.11.034
EP  - 189
PY  - 2017///
SN  - 0142-1123
SP  - 177
TI  - On cold dwell facet fatigue in titanium alloy aero-engine components
T2  - International Journal of Fatigue
UR  - http://dx.doi.org/10.1016/j.ijfatigue.2016.11.034
UR  - https://www.sciencedirect.com/science/article/pii/S0142112316304054?via%3Dihub
UR  - http://hdl.handle.net/10044/1/42798
VL  - 97
ER  -
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