Analysis of residual stresses around welds in a combustion casing

Xu Song, Ioannis Kyriakoglou, Alexander M. Korsunsky

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

The electron-beam (EB) welding process and the subsequent post-weld heat treatment (PWHT) in an aero-engine combustion casing were simulated in 2D and validated by comparison with hole-drilling measurements. The full 3D modelling including the details of the complex component geometry was then carried out, and used as the "reference" state for the eigenstrain reconstruction problem. Permanent strain distribution along two hoop welds and a circumferential soleplate weld were represented using a set of basis functions appropriately chosen and justified for the specific case considered. Inverse eigenstrain method was applied in order to determine the unknown parameters that give rise to the best agreement between eigenstrain reconstruction and the "reference" residual stress (RS) distributions. The result appears to capture successfully the RS distribution at all locations of major stress concentration, and to provide a satisfactory RS approximation in other regions.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalProcedia Engineering
Volume1
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventMesomechanics 2009 - Oxford, United Kingdom
Duration: 24 Jun 200926 Jun 2009

Keywords

  • Combustion Casing
  • EB and PWHT
  • Eigenstrain
  • Residual Stresses

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