Inverse eigenstrain analysis of residual stresses in friction stir welds

H. T. Luckhoo, T. S. Jun, A. M. Korsunsky

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)


This paper presents the results of eigenstrain analysis in a friction stir welded 12mm-thick 12%Cr steel plate. The finite element models are established for inverse eigenstrain analysis for three different model cases. As the region containing the eigenstrain distribution expands, the accuracy of the residual strain reconstruction improves. If the eigenstrain is allowed to be present along the entirety of the sample, good agreement can be achieved. It is also noting that eigenstrain (permanent plastic strain) represents the consequence of numerous inelastic processes occurring during to welding. The results suggest that significant inelastic deformation of the plate takes place even at larger distances from the weld. This conclusion requires validation by independent means, experimental and/or modelling.

Original languageEnglish
Pages (from-to)213-216
Number of pages4
JournalProcedia Engineering
Issue number1
Publication statusPublished - 2009
Externally publishedYes
EventMesomechanics 2009 - Oxford, United Kingdom
Duration: 24 Jun 200926 Jun 2009


  • Eigenstrain
  • Friction stir welding
  • Residual stress
  • Synchrotron X-ray diffraction


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