Advertisement

Grating Shearography and its Application to Residual Stresses Evaluation

  • Jacek Bulhak
  • Jian Lu
  • Guillaume Montay
  • Yves Surrel
  • Alain Vautrin

Abstract

Grating shearography is a modification of moiré interferometry where a shearing element in the observation setup allows to directly measure strains, local rotations and out of plane slopes, with the extra advantage of insensitivity to parasitic vibrations. The theory is presented and the technique is applied to the problem of residual stresses evaluation using the incremental hole-drilling technique in an aluminium shot-peened sample. The strain sensivity, measured as the noise standard deviation, has been found to be 50 microstrains. The spatial resolution, measured as the shear distance, was 0.1 mm.

Keywords

Residual Stress Michelson Interferometer Noise Standard Deviation Sensitivity Vector Moire Interferometry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. Mathar: Determination of initial stresses by measuring the deformations around drilled holes. Trans ASME 59, 249-254 (1934)Google Scholar
  2. 2.
    G.S. Schajer: Application of finite element calculation to residual stress measurements. Journal of engineering materials and technology, 157-163 (1981)Google Scholar
  3. 3.
    W. Soete, and R. Vancrombrugge: Determination of residual stresses below the surface. Residual stresses in metals and metal construction (W.R. Osgood Ed., Reinhold Publisher, N.Y., USA, 17-28, 1954).Google Scholar
  4. 4.
    Z. Wu, J. Lu, and B. Han: Study of residual stress distribution by a combined method of moiré interferometry and incremental hole-drilling — Part I, Theory. J. Appl. Mech., 65 (9) (1998).Google Scholar
  5. 5.
    Z. Wu, J. Lu, P. Joulaud and B. Han: Study of residual stress distribution by a combined method of moiré interferometry and incremental hole-drilling - Part II, Implementation. J. Appl. Mech., 65(9) (1998).Google Scholar
  6. 6.
    D. Post, B. Han and P. Ifju: High sensitivity moiré (Springer Verlag 1994).CrossRefGoogle Scholar
  7. 7.
    J. Bulhak, and Y. Surrel: Grating shearography. SPIE Proc. 3744, M. Kujawinska and M. Takeda Eds., Interferometry `99-Techniques and technologies, 506-515 (1999).ADSCrossRefGoogle Scholar
  8. 8.
    Y. Surrel: Fringe analysis. Photomechanics (P.K. Rastogi Ed., Springer Verlag, 57-104 (1999)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Jacek Bulhak
    • 1
  • Jian Lu
    • 2
  • Guillaume Montay
    • 2
  • Yves Surrel
    • 3
  • Alain Vautrin
    • 1
  1. 1.Dpt. of Mechanical and Materials Eng.École des MinesSt ÉtienneFrance
  2. 2.LASMISUniversité de Technologie de TroyesTroyesFrance
  3. 3.BNM/CNAMINM (National Institute of Metrology)ParisFrance

Personalised recommendations