Research Repository

See what's under the surface

On the interpretation of results from small punch creep tests

Hyde, T H.; Stoyanov, M; Sun, Wei; Hyde, Christopher J.

Authors

T H. Hyde

M Stoyanov

Wei Sun

Christopher J. Hyde

Abstract

The small punch creep testing method is highly complex and involves interactions between a number of non-linear processes. The deformed shapes that are produced from such tests are related to the punch and specimen dimensions and to the elastic, plastic, and creep behaviour of the test material, under contact and large deformation conditions, at elevated temperature. Owing to its complex nature, it is difficult to interpret the small punch test creep data in relation to the corresponding uniaxial creep behaviour of the material. One of the aims of this paper is to identify the important characteristics of the creep deformation resulting from ‘localized’ deformations and from the ‘overall’ deformation of the specimen. Following this, the results of approximate analytical and detailed finite element analyses of small punch tests are investigated. It is shown that the regions of the uniaxial creep test curves dominated by primary, secondary, and tertiary creep are not those that are immediately apparent from the displacement versus time records produced during a small punch test. On the basis of the interpretation of the finite element results presented, a method based on a reference stress approach is proposed for interpreting the results of small punch test experimental data. Future work planned for the interpretation of small punch tests data is briefly addressed.

Journal Article Type Article
Publication Date Apr 1, 2010
Journal Journal of Strain Analysis for Engineering Design
Print ISSN 0309-3247
Electronic ISSN 2041-3130
Publisher SAGE Publications (UK and US)
Peer Reviewed Peer Reviewed
Volume 45
Issue 3
Institution Citation Hyde, T. H., Stoyanov, M., Sun, W., & Hyde, C. J. (2010). On the interpretation of results from small punch creep tests. Journal of Strain Analysis for Engineering Design, 45(3), doi:10.1243/03093247JSA592
DOI https://doi.org/10.1243/03093247JSA592
Publisher URL http://journals.sagepub.com/doi/abs/10.1243/03093247JSA592
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

Files

Hyde - JSA Manuscript - ePrints.pdf (4.6 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf




Downloadable Citations