An optimisation study of the modified deep-hole drilling technique using finite element analyses applied to a stainless steel ring welded circular disc

Gang Zheng, Sayeed Hossain, Ed Kingston, Christopher E. Truman, David J. Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

5 Citations (Scopus)
297 Downloads (Pure)

Abstract

A circular disc containing a partial ring weld was devised to create high levels of residual stress in a relatively small specimen. The aim of the study was to utilise the complex residual stress generated within the weld and to extend the recently developed novel application of the deep-hole drilling technique in measuring residual stresses well over yield stress. This paper presents (1) finite element analysis (FEA) simulation of the residual stresses due to partial welding in an austenitic stainless steel circular disc, (2) measurement of residual stress using non-destructive and semi-destructive techniques and (3) simulation of the semi-destructive residual stress measurement technique. Comparison is made between the FEA predicted residual stress in the weld, the measurements and the reconstructed residual stresses of the measurements. The purpose of the residual stress measurement was to validate the FEA predicted weld residual stress in the circular disc. The FEA simulation of the measurement method was used (1) to explain any discrepancy between the measured and FEA predicted stresses and (2) to further modify and extend the present deep-hole drilling technique and improve its accuracy. The close correlations confirmed the suitability of new modifications made in the deep-hole drilling technique to account for plasticity when measuring near yield residual stresses present in a component.
Original languageEnglish
Pages (from-to)146-166
Number of pages21
JournalInternational Journal of Solids and Structures
Volume118-119
Early online date13 Apr 2017
DOIs
Publication statusPublished - Jul 2017

Keywords

  • Ring weld, residual stress
  • Deep-hole drilling (DHD)
  • Plasticity
  • Finite element method
  • Neutron diffraction technique

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