The contour method is a relatively new relaxation method for residual stress measurement and may be seen as an evolution of established methods such as hole drilling. The general procedure when applying the contour method is cutting, measurement and calculation of residual stress normal to the cut plane using Bueckner’s principle of elastic superposition. That is the residual stresses are determined from the measured profile of a cut surface. While the contour method is simple in concept there are certain underlying issues relating to the cutting process that may lead to uncertainties in the measured results. Principally the issues are that of constraint and plasticity during cutting and the influence they have on the measured residual stresses. In this paper both issues are investigated in detail by simulating the entire contour method process using finite element techniques for two welded specimens. Constraint has been a recognised concern for the contour method with the general requirement being to hold the specimen as rigidly as possible. Both clamping and fixing bolts are routinely used however in reality these methods do not provide a fully rigid constraint. In this work a range of constraints have been examined to determine the influence on the measured residual stresses. Plasticity, as a consequence of the cutting process, has also been recognised as a factor which may affect the measured residual stresses. In this work the extent of plasticity is predicted by simulation of the cutting process. With a known initial residual stress field the effects of plasticity are directly quantifiable. This work therefore provides an extremely useful insight into some of the key issues that affect the measurement performance of the contour method.
Skip Nav Destination
ASME 2008 Pressure Vessels and Piping Conference
July 27–31, 2008
Chicago, Illinois, USA
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4829-6
PROCEEDINGS PAPER
Assessment of the Influence of Plasticity and Constraint on Measured Residual Stresses Using the Contour Method Available to Purchase
R. J. Dennis,
R. J. Dennis
Frazer-Nash Consultancy Ltd., Bristol, UK
Search for other works by this author on:
D. P. Bray,
D. P. Bray
Frazer-Nash Consultancy Ltd., Bristol, UK
Search for other works by this author on:
N. A. Leggatt,
N. A. Leggatt
Frazer-Nash Consultancy Ltd., Bristol, UK
Search for other works by this author on:
M. Turski
M. Turski
University of Manchester, Manchester, UK
Search for other works by this author on:
R. J. Dennis
Frazer-Nash Consultancy Ltd., Bristol, UK
D. P. Bray
Frazer-Nash Consultancy Ltd., Bristol, UK
N. A. Leggatt
Frazer-Nash Consultancy Ltd., Bristol, UK
M. Turski
University of Manchester, Manchester, UK
Paper No:
PVP2008-61490, pp. 477-485; 9 pages
Published Online:
July 24, 2009
Citation
Dennis, RJ, Bray, DP, Leggatt, NA, & Turski, M. "Assessment of the Influence of Plasticity and Constraint on Measured Residual Stresses Using the Contour Method." Proceedings of the ASME 2008 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Chicago, Illinois, USA. July 27–31, 2008. pp. 477-485. ASME. https://doi.org/10.1115/PVP2008-61490
Download citation file:
27
Views
Related Proceedings Papers
Related Articles
Local Stress-Ratio Criterion for Incremental Hole-Drilling Measurements of Shot-Peening Stresses
J. Eng. Mater. Technol (April,2006)
Related Chapters
Developing Human Performance Measures (PSAM-0207)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)
Study on Screw Drill Wear When Drilling Low Carbon Stainless Steel and Accompanying Phenomena in the Cutting Zone
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)
Layout
Fabrication of Metallic Pressure Vessels