Residual stress evaluation in dissimilar welded joints using finite element simulation and the L CR ultrasonic wave

Yashar Javadi, Mehdi Ahmadi Najafabadi, Mehdi Akhlaghi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Subsurface stresses in welded structures increase the likelihood of fatigue cracks and environmental induced material degradation. The ability to evaluate stresses at the surface as well as in the interior of welded structural members would substantially increase the accuracy of structure life estimation. The longitudinal critically refracted (L CR) wave is a bulk longitudinal mode that travels within an effective depth underneath the surface. It may be used to detect in-plane subsurface stresses in the structures. This paper presents a three dimensional thermo-mechanical analysis to evaluate welding residual stresses in dissimilar plate-plate joint of AISI stainless steel 304 and Carbon Steel A106-B type. After finite element simulation, the residual stresses were evaluated by L CR ultrasonic waves. Finally the results of two methods were compared and verified by hole-drilling method. This paper introduces a combination of "Finite Element Welding Simulation" and "Ultrasonic Stress Measurement using the L CR Wave" which is called as "FEL CR". The capabilities of FEL CR″. The capabilities of FEL CR in residual stress measurement are confirmed here. And also this paper evaluates residual stresses of dissimilar welded joints by LCR ultrasonic waves. It has been shown that predicted residual stress from three dimensional FE analyses is in reasonable agreement with measured residual stress from LCR method and also the results of both are verified with hole-drilling experimental measurements.

LanguageEnglish
Pages541-552
Number of pages12
JournalRussian Journal of Nondestructive Testing
Volume48
Issue number9
DOIs
Publication statusPublished - 1 Sep 2012
Externally publishedYes

Fingerprint

welded joints
Ultrasonic waves
ultrasonic radiation
residual stress
Residual stresses
Welds
evaluation
Free electron lasers
stress measurement
simulation
Stress measurement
drilling
welding
Drilling
Welding
welded structures
structural members
Ultrasonic measurement
plane stress
Structural members

Keywords

  • acoustoelastic effect
  • dissimilar welded joint
  • FEL
  • finite element welding simulation
  • hole-drilling measurement
  • L
  • ultrasonic stress measurement
  • welding residual stress

Cite this

Javadi, Yashar ; Najafabadi, Mehdi Ahmadi ; Akhlaghi, Mehdi. / Residual stress evaluation in dissimilar welded joints using finite element simulation and the L CR ultrasonic wave. 2012 ; Vol. 48, No. 9. pp. 541-552.
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Residual stress evaluation in dissimilar welded joints using finite element simulation and the L CR ultrasonic wave. / Javadi, Yashar; Najafabadi, Mehdi Ahmadi; Akhlaghi, Mehdi.

Vol. 48, No. 9, 01.09.2012, p. 541-552.

Research output: Contribution to journalArticle

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