Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor
This paper presents an elasto-visco-plastic finite element modelling framework including the associated UMAT codes to investigate the high temperature behaviour of gas turbine rotor steels. The model used in the FE study is an improved and unified multi-axial Chaboche-Lemaitre model which takes into...
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| Format: | Article |
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Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/48495/ |
| _version_ | 1848797777252843520 |
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| author | Benaarbia, Adil Rae, Y. Sun, Wei |
| author_facet | Benaarbia, Adil Rae, Y. Sun, Wei |
| author_sort | Benaarbia, Adil |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper presents an elasto-visco-plastic finite element modelling framework including the associated UMAT codes to investigate the high temperature behaviour of gas turbine rotor steels. The model used in the FE study is an improved and unified multi-axial Chaboche-Lemaitre model which takes into account non-linear kinematic and isotropic hardening. The computational methodology is a three-dimensional framework following an implicit formulation and based on a radial return mapping algorithm. The UMAT is calibrated and validated across isothermal hold-time cyclic tests. The methodology developed is applied to a classical industrial gas turbine rotor where the study focuses its attention on the deformation heterogeneities and critical high stress areas within the rotor structure. The effect of thermal transients and geometry singularities on the development of residual stresses is underlined. Finally, the potential improvements and extensions of such FE viscoplastic analysis is discussed. |
| first_indexed | 2025-11-14T20:09:16Z |
| format | Article |
| id | nottingham-48495 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:09:16Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-484952020-05-04T19:52:23Z https://eprints.nottingham.ac.uk/48495/ Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor Benaarbia, Adil Rae, Y. Sun, Wei This paper presents an elasto-visco-plastic finite element modelling framework including the associated UMAT codes to investigate the high temperature behaviour of gas turbine rotor steels. The model used in the FE study is an improved and unified multi-axial Chaboche-Lemaitre model which takes into account non-linear kinematic and isotropic hardening. The computational methodology is a three-dimensional framework following an implicit formulation and based on a radial return mapping algorithm. The UMAT is calibrated and validated across isothermal hold-time cyclic tests. The methodology developed is applied to a classical industrial gas turbine rotor where the study focuses its attention on the deformation heterogeneities and critical high stress areas within the rotor structure. The effect of thermal transients and geometry singularities on the development of residual stresses is underlined. Finally, the potential improvements and extensions of such FE viscoplastic analysis is discussed. Elsevier 2018-02 Article PeerReviewed Benaarbia, Adil, Rae, Y. and Sun, Wei (2018) Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor. International Journal of Mechanical Sciences, 136 . pp. 36-49. ISSN 0020-7403 Cyclic viscoplasticity finite element return mapping gas turbine rotor https://www.sciencedirect.com/science/article/pii/S0020740317324323 doi:10.1016/j.ijmecsci.2017.12.008 doi:10.1016/j.ijmecsci.2017.12.008 |
| spellingShingle | Cyclic viscoplasticity finite element return mapping gas turbine rotor Benaarbia, Adil Rae, Y. Sun, Wei Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title | Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title_full | Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title_fullStr | Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title_full_unstemmed | Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title_short | Unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| title_sort | unified viscoplasticity modelling and its application to fatigue-creep behaviour of gas turbine rotor |
| topic | Cyclic viscoplasticity finite element return mapping gas turbine rotor |
| url | https://eprints.nottingham.ac.uk/48495/ https://eprints.nottingham.ac.uk/48495/ https://eprints.nottingham.ac.uk/48495/ |