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    Rights statement: This is the author’s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, 114, 2018 DOI: 10.1016/j.ijfatigue.2018.05.010

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The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects

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The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects. / Lam Wing Cheong, M. F. ; Rouse, J. P.; Hyde, C. J.; Kennedy, Andrew.

In: International Journal of Fatigue, Vol. 114, 30.09.2018, p. 92-108.

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Lam Wing Cheong, M. F. ; Rouse, J. P. ; Hyde, C. J. ; Kennedy, Andrew. / The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects. In: International Journal of Fatigue. 2018 ; Vol. 114. pp. 92-108.

Bibtex

@article{2b721c8a887c431bb52b800bb33715c2,
title = "The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects",
abstract = "Rapid thermal ageing has been observed in the literature for certain aerospace aluminium alloys under conditions which are foreseeable in their intended component applications. While several experimental programs have explored this phenomenon in the laboratory, efforts to incorporate these effects in unified constitutive models have, to date, been lacking. In the present work, a modified elastic-viscoplastic material model has been fitted to 7175-T7351 aluminium alloy data under fully-reversed uniaxial (strain-controlled) isothermal loading conditions at 160 °C and 200 °C. These temperatures were chosen in order to represent nominal and extreme (but still operationally relevant) conditions experienced by aero-engine gearbox components. The modified elastic-viscoplastic model is able to accurately predict the hysteresis loops of the strain-controlled fatigue data of each sample at 160 °C and 200 °C. Additionally, it was found that the isotropic hardening can be effectively de-coupled into material ageing and mechanical softening components.",
keywords = "Fatigue, Aging, Chaboche, Aluminium, Microscopy",
author = "{Lam Wing Cheong}, {M. F.} and Rouse, {J. P.} and Hyde, {C. J.} and Andrew Kennedy",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, 114, 2018 DOI: 10.1016/j.ijfatigue.2018.05.010",
year = "2018",
month = sep,
day = "30",
doi = "10.1016/j.ijfatigue.2018.05.010",
language = "English",
volume = "114",
pages = "92--108",
journal = "International Journal of Fatigue",
issn = "0142-1123",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects

AU - Lam Wing Cheong, M. F.

AU - Rouse, J. P.

AU - Hyde, C. J.

AU - Kennedy, Andrew

N1 - This is the author’s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, 114, 2018 DOI: 10.1016/j.ijfatigue.2018.05.010

PY - 2018/9/30

Y1 - 2018/9/30

N2 - Rapid thermal ageing has been observed in the literature for certain aerospace aluminium alloys under conditions which are foreseeable in their intended component applications. While several experimental programs have explored this phenomenon in the laboratory, efforts to incorporate these effects in unified constitutive models have, to date, been lacking. In the present work, a modified elastic-viscoplastic material model has been fitted to 7175-T7351 aluminium alloy data under fully-reversed uniaxial (strain-controlled) isothermal loading conditions at 160 °C and 200 °C. These temperatures were chosen in order to represent nominal and extreme (but still operationally relevant) conditions experienced by aero-engine gearbox components. The modified elastic-viscoplastic model is able to accurately predict the hysteresis loops of the strain-controlled fatigue data of each sample at 160 °C and 200 °C. Additionally, it was found that the isotropic hardening can be effectively de-coupled into material ageing and mechanical softening components.

AB - Rapid thermal ageing has been observed in the literature for certain aerospace aluminium alloys under conditions which are foreseeable in their intended component applications. While several experimental programs have explored this phenomenon in the laboratory, efforts to incorporate these effects in unified constitutive models have, to date, been lacking. In the present work, a modified elastic-viscoplastic material model has been fitted to 7175-T7351 aluminium alloy data under fully-reversed uniaxial (strain-controlled) isothermal loading conditions at 160 °C and 200 °C. These temperatures were chosen in order to represent nominal and extreme (but still operationally relevant) conditions experienced by aero-engine gearbox components. The modified elastic-viscoplastic model is able to accurately predict the hysteresis loops of the strain-controlled fatigue data of each sample at 160 °C and 200 °C. Additionally, it was found that the isotropic hardening can be effectively de-coupled into material ageing and mechanical softening components.

KW - Fatigue

KW - Aging

KW - Chaboche

KW - Aluminium

KW - Microscopy

U2 - 10.1016/j.ijfatigue.2018.05.010

DO - 10.1016/j.ijfatigue.2018.05.010

M3 - Journal article

VL - 114

SP - 92

EP - 108

JO - International Journal of Fatigue

JF - International Journal of Fatigue

SN - 0142-1123

ER -