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Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy
Materials at High Temperatures, Volume: 39, Issue: 2, Pages: 133 - 148
Swansea University Author:
Mark Evans
DOI (Published version): 10.1080/09603409.2021.2024418
Abstract
In this paper, a new constitutive model is presented that combines the Wilshire equations with a modified Kachanov-Rabotnov continuum damage mechanics (CDM) to enable the prediction of uniaxial creep curves that contain both a primary and tertiary stage. Another advantage of this approach is that th...
Published in: | Materials at High Temperatures |
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ISSN: | 0960-3409 1878-6413 |
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Informa UK Limited
2022
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URI: | https://cronfa.swan.ac.uk/Record/cronfa59161 |
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2022-10-31T16:55:22.3037821 v2 59161 2022-01-12 Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy 7720f04c308cf7a1c32312058780d20c 0000-0003-2056-2396 Mark Evans Mark Evans true false 2022-01-12 MTLS In this paper, a new constitutive model is presented that combines the Wilshire equations with a modified Kachanov-Rabotnov continuum damage mechanics (CDM) to enable the prediction of uniaxial creep curves that contain both a primary and tertiary stage. Another advantage of this approach is that the Wilshire equations have been shown to accurately extrapolate the operational failure times and minimum creep rates from very short- term tests. This approach also removes the need to estimate the Wilshire time to strain equation at numerous different strains. A simple but multi-step procedure is also introduced for estimating the unknown parameters of this model. When applied to Waspaloy data, the model was shown to represent the shape of the experimental creep curves reasonably well especially at low and high strains) and provides reasonable creep curve predictions – with percentages errors averaging around 4-5%. Journal Article Materials at High Temperatures 39 2 133 148 Informa UK Limited 0960-3409 1878-6413 Creep curves, Wilshire equations, Constitutive models 4 3 2022 2022-03-04 10.1080/09603409.2021.2024418 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2022-10-31T16:55:22.3037821 2022-01-12T12:03:59.5399456 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mark Evans 0000-0003-2056-2396 1 59161__22122__4fefd958e4d7453e8bdad8b8235cce18.pdf 59161.pdf 2022-01-12T12:07:00.1347715 Output 1167899 application/pdf Accepted Manuscript true 2023-01-12T00:00:00.0000000 Released under the terms of a CC-BY-NC license. true eng https://creativecommons.org/licenses/by-nc/4.0/ |
title |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
spellingShingle |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy Mark Evans |
title_short |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
title_full |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
title_fullStr |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
title_full_unstemmed |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
title_sort |
Incorporating the Wilshire equations for time to failure and the minimum creep rate into a continuum damage mechanics for the creep strain of Waspaloy |
author_id_str_mv |
7720f04c308cf7a1c32312058780d20c |
author_id_fullname_str_mv |
7720f04c308cf7a1c32312058780d20c_***_Mark Evans |
author |
Mark Evans |
author2 |
Mark Evans |
format |
Journal article |
container_title |
Materials at High Temperatures |
container_volume |
39 |
container_issue |
2 |
container_start_page |
133 |
publishDate |
2022 |
institution |
Swansea University |
issn |
0960-3409 1878-6413 |
doi_str_mv |
10.1080/09603409.2021.2024418 |
publisher |
Informa UK Limited |
college_str |
Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
department_str |
School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering |
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active_str |
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description |
In this paper, a new constitutive model is presented that combines the Wilshire equations with a modified Kachanov-Rabotnov continuum damage mechanics (CDM) to enable the prediction of uniaxial creep curves that contain both a primary and tertiary stage. Another advantage of this approach is that the Wilshire equations have been shown to accurately extrapolate the operational failure times and minimum creep rates from very short- term tests. This approach also removes the need to estimate the Wilshire time to strain equation at numerous different strains. A simple but multi-step procedure is also introduced for estimating the unknown parameters of this model. When applied to Waspaloy data, the model was shown to represent the shape of the experimental creep curves reasonably well especially at low and high strains) and provides reasonable creep curve predictions – with percentages errors averaging around 4-5%. |
published_date |
2022-03-04T04:16:15Z |
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1763754089367207936 |
score |
11.021648 |