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Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy

Mark Evans Orcid Logo, Tom Williams

International Journal of Pressure Vessels and Piping, Volume: 172, Pages: 153 - 165

Swansea University Authors: Mark Evans Orcid Logo, Tom Williams

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DOI (Published version): 10.1016/j.ijpvp.2019.03.032

Abstract

It is important to be able to predict creep strains in aeroengine so as to enable small punch disc test results to be related to uniaxial creep test results using finite element models. The capability of the Wilshire equation to interpolate creep curves was assessed using creep tests on Waspaloy. Th...

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Published in: International Journal of Pressure Vessels and Piping
ISSN: 0308-0161
Published: Elsevier BV 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49705
first_indexed 2019-03-26T12:24:07Z
last_indexed 2020-08-05T03:11:56Z
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recordtype SURis
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spelling 2020-08-04T18:10:22.1164592 v2 49705 2019-03-25 Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy 7720f04c308cf7a1c32312058780d20c 0000-0003-2056-2396 Mark Evans Mark Evans true false 3963870234ba2160675c48eb572ec39a Tom Williams Tom Williams true false 2019-03-25 EAAS It is important to be able to predict creep strains in aeroengine so as to enable small punch disc test results to be related to uniaxial creep test results using finite element models. The capability of the Wilshire equation to interpolate creep curves was assessed using creep tests on Waspaloy. This assessment required modifying the Wilshire equation for time to strains so that the parameters of this equation could be predicted as a function of strain in a way that did not allow predicted creep curves to double back on themselves. An artificial neural network was used to achieve this. It was found that the modified model was capable of interpolating the shape and the end points of the experimental creep curves. These modifications enabled the activation energy to be measured and it was found that the activation energy is dependent upon the average internal stress and thus strain. Journal Article International Journal of Pressure Vessels and Piping 172 153 165 Elsevier BV 0308-0161 Creep curves, Wilshire equations, Interpolative evaluation, ANN 1 5 2019 2019-05-01 10.1016/j.ijpvp.2019.03.032 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2020-08-04T18:10:22.1164592 2019-03-25T15:28:15.2036474 Mark Evans 0000-0003-2056-2396 1 Tom Williams 2 49705__13245__65df4d219fd8458c86908278b9feef87.pdf evans2019.pdf 2019-03-25T15:29:29.1600000 Output 893079 application/pdf Accepted Manuscript true 2020-03-26T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng
title Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
spellingShingle Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
Mark Evans
Tom Williams
title_short Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
title_full Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
title_fullStr Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
title_full_unstemmed Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
title_sort Assessing the capability of the Wilshire equations in predicting uniaxial creep curves: An application to Waspaloy
author_id_str_mv 7720f04c308cf7a1c32312058780d20c
3963870234ba2160675c48eb572ec39a
author_id_fullname_str_mv 7720f04c308cf7a1c32312058780d20c_***_Mark Evans
3963870234ba2160675c48eb572ec39a_***_Tom Williams
author Mark Evans
Tom Williams
author2 Mark Evans
Tom Williams
format Journal article
container_title International Journal of Pressure Vessels and Piping
container_volume 172
container_start_page 153
publishDate 2019
institution Swansea University
issn 0308-0161
doi_str_mv 10.1016/j.ijpvp.2019.03.032
publisher Elsevier BV
document_store_str 1
active_str 0
description It is important to be able to predict creep strains in aeroengine so as to enable small punch disc test results to be related to uniaxial creep test results using finite element models. The capability of the Wilshire equation to interpolate creep curves was assessed using creep tests on Waspaloy. This assessment required modifying the Wilshire equation for time to strains so that the parameters of this equation could be predicted as a function of strain in a way that did not allow predicted creep curves to double back on themselves. An artificial neural network was used to achieve this. It was found that the modified model was capable of interpolating the shape and the end points of the experimental creep curves. These modifications enabled the activation energy to be measured and it was found that the activation energy is dependent upon the average internal stress and thus strain.
published_date 2019-05-01T08:50:55Z
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score 11.0597

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