Wei Sun
Determination of Creep Damage Properties from Small Punch Creep Tests Considering Pre-Straining Effect Using an Inverse Approach
Sun, Wei; Liu, Hao
Authors
Hao Liu
Contributors
Wei Sun
Supervisor
Hao Liu
Sponsor
Abstract
© 2019 Elsevier Ltd Although the small punch creep test (SPCT) has been commonly accepted as an effective small specimen material characterisation technique (e.g. the European Code of Practice (CoP) for small punch test was produced in 2006 to provide a practical guideline for the experimental work and data interpretation of small punch test), the conversion from the experimental results obtained from the SPCT, i.e. displacement-time data, to the corresponding strain-time data obtained from conventional uniaxial creep tests has not been thoroughly understood due to the complex nature of the deformation and material failure mechanisms involved in the SPCT, e.g. contact mechanism, material nonlinearity, large deformation and initial plasticity damage. The current paper presents an inverse method to determine the creep properties directly from the SPCT experimental results, without converting them to the uniaxial creep test data. A finite element (FE) model taking account of the conventionally overlooked pre-straining effect has been employed for an inverse optimisation method for the first time. The inverse method has been proven to be capable of effectively predicting the creep behaviours of a P91 steel at 600 °C with a good agreement to the experimental results.
Citation
Sun, W., & Liu, H. (2019). Determination of Creep Damage Properties from Small Punch Creep Tests Considering Pre-Straining Effect Using an Inverse Approach. Mechanics of Materials, 139, https://doi.org/10.1016/j.mechmat.2019.103171
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 4, 2019 |
Online Publication Date | Sep 5, 2019 |
Publication Date | Dec 1, 2019 |
Deposit Date | Sep 4, 2019 |
Publicly Available Date | Mar 28, 2024 |
Journal | Mechanics of Materials |
Print ISSN | 0167-6636 |
Electronic ISSN | 1872-7743 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 139 |
Article Number | 103171 |
DOI | https://doi.org/10.1016/j.mechmat.2019.103171 |
Keywords | Instrumentation; General Materials Science; Mechanics of Materials |
Public URL | https://nottingham-repository.worktribe.com/output/2564759 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0167663619302856?via%3Dihub |
Additional Information | This article is maintained by: Elsevier; Article Title: Determination of creep damage properties from small punch creep tests considering pre-straining effect using an inverse approach; Journal Title: Mechanics of Materials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.mechmat.2019.103171; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved. |
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