Simulation of the fatigue behaviour of a power plant steel with a damage variable
The fatigue behaviour of a 9Cr power plant steel at a temperature of 600 °C was studied by uniaxial fatigue tests and microstructural analysis using electron microscopy. A continuum damage mechanics apporach was coupled to the constitutive equations of the Chaboche elasto-visco-plastic model to desc...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2015
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/35179/ |
| _version_ | 1848795021815316480 |
|---|---|
| author | Lu, Jiawa Sun, Wei Becker, Adib A. Saad, Abdullah Aziz |
| author_facet | Lu, Jiawa Sun, Wei Becker, Adib A. Saad, Abdullah Aziz |
| author_sort | Lu, Jiawa |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The fatigue behaviour of a 9Cr power plant steel at a temperature of 600 °C was studied by uniaxial fatigue tests and microstructural analysis using electron microscopy. A continuum damage mechanics apporach was coupled to the constitutive equations of the Chaboche elasto-visco-plastic model to describe the fatigue behaviour of the 9Cr power plant steel at 600 °C. A stress partition method is introduced to understand the fatigue softening behaviour, and used to give an initial estimate of the material constants in the Chaboche model. Further optimisation procedures with plastic strain range dependency of the material constants were introduced in the optimisation procedure in order to accurately predict the material behaviour, especially after damage initiation. An ABAQUS UMAT subroutine was coded to allow the full life cyclic softening behaviour of a power plant component to be accurately predicted in a finite element calculation. The multiaxial capability of the coding is validated against notched bar test data. |
| first_indexed | 2025-11-14T19:25:28Z |
| format | Article |
| id | nottingham-35179 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:25:28Z |
| publishDate | 2015 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-351792020-05-04T17:14:07Z https://eprints.nottingham.ac.uk/35179/ Simulation of the fatigue behaviour of a power plant steel with a damage variable Lu, Jiawa Sun, Wei Becker, Adib A. Saad, Abdullah Aziz The fatigue behaviour of a 9Cr power plant steel at a temperature of 600 °C was studied by uniaxial fatigue tests and microstructural analysis using electron microscopy. A continuum damage mechanics apporach was coupled to the constitutive equations of the Chaboche elasto-visco-plastic model to describe the fatigue behaviour of the 9Cr power plant steel at 600 °C. A stress partition method is introduced to understand the fatigue softening behaviour, and used to give an initial estimate of the material constants in the Chaboche model. Further optimisation procedures with plastic strain range dependency of the material constants were introduced in the optimisation procedure in order to accurately predict the material behaviour, especially after damage initiation. An ABAQUS UMAT subroutine was coded to allow the full life cyclic softening behaviour of a power plant component to be accurately predicted in a finite element calculation. The multiaxial capability of the coding is validated against notched bar test data. Elsevier 2015-09-01 Article PeerReviewed Lu, Jiawa, Sun, Wei, Becker, Adib A. and Saad, Abdullah Aziz (2015) Simulation of the fatigue behaviour of a power plant steel with a damage variable. International Journal of Mechanical Sciences, 100 . pp. 145-157. ISSN 0020-7403 Cyclic plasticity; Chaboche visco-plasticity model; Continuum damage mechanics; UMAT subroutine http://www.sciencedirect.com/science/article/pii/S0020740315002301 doi:10.1016/j.ijmecsci.2015.06.019 doi:10.1016/j.ijmecsci.2015.06.019 |
| spellingShingle | Cyclic plasticity; Chaboche visco-plasticity model; Continuum damage mechanics; UMAT subroutine Lu, Jiawa Sun, Wei Becker, Adib A. Saad, Abdullah Aziz Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title | Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title_full | Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title_fullStr | Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title_full_unstemmed | Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title_short | Simulation of the fatigue behaviour of a power plant steel with a damage variable |
| title_sort | simulation of the fatigue behaviour of a power plant steel with a damage variable |
| topic | Cyclic plasticity; Chaboche visco-plasticity model; Continuum damage mechanics; UMAT subroutine |
| url | https://eprints.nottingham.ac.uk/35179/ https://eprints.nottingham.ac.uk/35179/ https://eprints.nottingham.ac.uk/35179/ |