Improvement of the Contour Method for Measurement of Near-Surface Residual Stresses from Laser Peening

M.B. Torpali, Michael E. Fitzpatrick, S. Gungor

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27 Citations (Scopus)

Abstract

A study was conducted to develop a methodology to obtain near-surface residual stresses for laser-peened aluminium alloy samples using the contour method. After cutting trials to determine the optimal cut parameters, surface contours were obtained and a new data analysis method based on spline smoothing was applied. A new criterion for determining the optimal smoothing parameters is introduced. Near-surface residual stresses obtained from the contour method were compared with X-ray diffraction and incremental hole drilling results. It is concluded that with optimal cutting parameters and data analysis, reliable near-surface residual stresses can be obtained by the contour method.
Original languageEnglish
Pages (from-to)1705-1718
JournalExperimental Mechanics
Volume53
Issue number9
DOIs
Publication statusPublished - May 2013

Bibliographical note

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Keywords

  • Contour method
  • Near-surface residual stresses
  • Bivariate spline smoothing
  • X-ray diffraction
  • Laser peening

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