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Modelling and experimental characterisation of a residual stress field in a ferritic compact tension specimen

Wenman, M. R.; Price, A. J.; Steuwer, Axel LU ; Chard-Tuckey, P. R. and Crocombe, A. (2009) In International Journal of Pressure Vessels and Piping 86(12). p.830-837
Abstract
The aim of the work is to elucidate the influence of plasticity behaviour on the residual stress field in a ferritic reactor pressure vessel steel. To this end, we investigate two compressively pre-loaded compact tension (CT) specimens to generate a mechanical residual stress field. One specimen was subsequently pre-cracked by fatigue before both specimens were measured using high-energy synchrotron X-ray diffraction. A fine grain size microstructure (similar to 5-10 mu m grain size) allowed a small X-ray beam slit size and therefore gauge volume. The results provide an excellent data set for validation of finite element (FE) modelling predictions against which they have been compared. The results of both mechanical testing and modelling... (More)
The aim of the work is to elucidate the influence of plasticity behaviour on the residual stress field in a ferritic reactor pressure vessel steel. To this end, we investigate two compressively pre-loaded compact tension (CT) specimens to generate a mechanical residual stress field. One specimen was subsequently pre-cracked by fatigue before both specimens were measured using high-energy synchrotron X-ray diffraction. A fine grain size microstructure (similar to 5-10 mu m grain size) allowed a small X-ray beam slit size and therefore gauge volume. The results provide an excellent data set for validation of finite element (FE) modelling predictions against which they have been compared. The results of both mechanical testing and modelling suggest that the use of a combined hardening model is needed to accurately predict the residual stress field present in the specimen after pre-loading. Some discrepancy between the modelled crack tip stress values and those found by X-ray diffraction remain which can be partly explained by volume averaging effects in the presence of very high stress/strain gradients. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
Plasticity, Finite element modelling, compression, In-plane, Residual stress, High-energy synchrotron X-ray diffraction
in
International Journal of Pressure Vessels and Piping
volume
86
issue
12
pages
830 - 837
publisher
Elsevier
external identifiers
  • wos:000277400500006
  • scopus:75049085067
ISSN
1879-3541
DOI
10.1016/j.ijpvp.2009.10.006
language
English
LU publication?
yes
id
dd25a7b9-3015-4e1c-aaa6-104fa96032da (old id 1616455)
date added to LUP
2010-06-22 16:11:42
date last changed
2017-01-01 05:00:00
@article{dd25a7b9-3015-4e1c-aaa6-104fa96032da,
  abstract     = {The aim of the work is to elucidate the influence of plasticity behaviour on the residual stress field in a ferritic reactor pressure vessel steel. To this end, we investigate two compressively pre-loaded compact tension (CT) specimens to generate a mechanical residual stress field. One specimen was subsequently pre-cracked by fatigue before both specimens were measured using high-energy synchrotron X-ray diffraction. A fine grain size microstructure (similar to 5-10 mu m grain size) allowed a small X-ray beam slit size and therefore gauge volume. The results provide an excellent data set for validation of finite element (FE) modelling predictions against which they have been compared. The results of both mechanical testing and modelling suggest that the use of a combined hardening model is needed to accurately predict the residual stress field present in the specimen after pre-loading. Some discrepancy between the modelled crack tip stress values and those found by X-ray diffraction remain which can be partly explained by volume averaging effects in the presence of very high stress/strain gradients. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.},
  author       = {Wenman, M. R. and Price, A. J. and Steuwer, Axel and Chard-Tuckey, P. R. and Crocombe, A.},
  issn         = {1879-3541},
  keyword      = {Plasticity,Finite element modelling,compression,In-plane,Residual stress,High-energy synchrotron X-ray diffraction},
  language     = {eng},
  number       = {12},
  pages        = {830--837},
  publisher    = {Elsevier},
  series       = {International Journal of Pressure Vessels and Piping},
  title        = {Modelling and experimental characterisation of a residual stress field in a ferritic compact tension specimen},
  url          = {http://dx.doi.org/10.1016/j.ijpvp.2009.10.006},
  volume       = {86},
  year         = {2009},
}