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Development of true-stress creep model through analysis of constant-load creep data with application to finite element methods / M. Connolly, M. Whittaker, S. Williams, Mark Whittaker

Materials Science and Technology, Volume: 30, Issue: 15, Pages: 1899 - 1904

Swansea University Author: Mark Whittaker

DOI (Published version): 10.1179/1743284714Y.0000000539

Abstract

The creep behaviour of the nickel-superalloy RR1000 is studied through a number of constant-load creep tests. It is often assumed that creep data generated by constant-load testing are unsuitable for building a generalised creep model due to the non-constant stresses incurred. Analysis of existing m...

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Published in: Materials Science and Technology
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa26773
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Abstract: The creep behaviour of the nickel-superalloy RR1000 is studied through a number of constant-load creep tests. It is often assumed that creep data generated by constant-load testing are unsuitable for building a generalised creep model due to the non-constant stresses incurred. Analysis of existing models shows that significant errors may occur in many approaches, which attempt to recreate the strain evolution with time. A model is presented which is not reliant on time as a parameter and is therefore able to utilise constant-load creep data without enforcing the assumption of a constant stress. This model is demonstrated through numerical analyses to replicate the creep behaviour across a large range of stresses accurately. The proposed model is then adapted as an Abaqus™ user-subroutine to demonstrate capability within finite element analysis.
College: College of Engineering
Issue: 15
Start Page: 1899
End Page: 1904