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Statistical Analysis of Residual Stress Profiles Using a Heuristic Method

[+] Author Affiliations
H. Teng, S. K. Bate, D. W. Beardsmore

Serco Technical and Assurance Services, Warrington, Cheshire, UK

Paper No. PVP2008-61378, pp. 37-42; 6 pages
doi:10.1115/PVP2008-61378
From:
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 1: Codes and Standards
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4824-1 | eISBN: 0-7918-3828-5
  • Copyright © 2008 by British Crown

abstract

In this paper we present a recently developed heuristic method for statistical analysis of residual stress that is based on a combination of the weighted least-squares method and the application of expert judgement. The least-squares method allows a model of the best residual stress profile to be determined as a linear combination of basis functions; the expert knowledge gives the flexibility of applying expert judgement to determine the weights from the observed scatter in the residual stress data. The heuristic method has been applied to a set of measurement data of a Welded Bead-on-Plate specimen. The results show that with the heuristic method, it is possible to obtain less conservative residual stress profile to a known confidence level.

Copyright © 2008 by British Crown

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