Skip to main content
SpringerLink
Log in

Strain in isotropic pin-joints: Experimental and numerical analysis

  • Technique
  • Published:
Experimental Techniques Aims and scope Submit manuscript

Conclusions

Phase-stepped Digital Speckle Pattern Interferometry has been effectively used for the determination of displacement and strain distributions for a case of high spatial gradients. Little or no specimen preparation is required. The in-plane displacement map is obtained quickly, and has a spatial resolution of the order of a few pixels in the frame grabber system. The least-square fitting of the displacement data allows for strain calculation with an equivalent gage length of ≈0.1 mm and a repeatability of ≈3 µstrain rms. The experimental data show good agreement with the numerical predictions obtained by a nonlinear contact finite element analysis.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. De Jong, T., “Stresses Around Pin-loaded Holes in Elastically Orthotropic or Isotropic Plates,” Journal of Composite Materials, Vol. 11, 313–331 (1977).

    Article  Google Scholar 

  2. Frocht, M.M. and Hill, H.N., “Stress-concentration Factors Around a Central Circular Hole in a Plate Loaded Through Pin in the Hole,” Journal of Applied Mechanics, Vol. 7 (1), 5–9 (1940).

    Google Scholar 

  3. Jessop, H.T., Snell, C. and Holister, G.S., “Photoelastic Investigation on Plates with Single Interference-fit Pins with Load Applied (a) to Pin Only and (b) to Pin and Plate Simultaneously,” The Aeronautical Quarterly, Vol. 9, 147–163 (1958).

    Article  Google Scholar 

  4. Grant, R.J., Smart, J. and Stanley, P., “A Parametric Study of the Elastic Stress Distribution in Pin-loaded Lugs,” Journal of Strain Analysis, Vol. 29 (4), 299–307 (1994).

    Article  Google Scholar 

  5. Cloud, G.L., Optical Methods of Engineering Analysis, Cambridge University Press, Cambridge (1995).

    Book  Google Scholar 

  6. Creath, K., “Digital Speckle Pattern Interferometry (DSPI) Using a 100×100 Imaging Array,” SPIE, Vol. 501, 292–298 (1984).

    Google Scholar 

  7. Leendertz, J.A., “Interferometric Displacement Measurement on Scattering Surfaces Utilizing Speckle Effect,” Journal of Physics E: Scientific Instruments, Vol. 3, 214–218 (1970).

    Article  Google Scholar 

  8. Creath, K., “Phase-shifting Speckle Interferometry,” Applied Optics, Vol. 24 (18), 3053–3058 (1985).

    Article  Google Scholar 

  9. Cloud, G.L. and Lanza di Scalea, F., “Strain Measurement by Digital Speckle Pattern Interferometry,” Post Conference Proceedings of the 1997 SEM Spring Conference on Experimental Mechanics, Bellevue, Washington, 151–157 (1998).

Download references

Author information

Authors and Affiliations

  1. Center for Non-destructive Evaluation, The Johns Hopkins University, Baltimore, MD, USA

    F. Lanza di Scalea (SEM member, Postdoctoral Fellow)

Authors
  1. F. Lanza di Scalea
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

This paper was the 2nd place winner of the 1997 Student Paper Competition, organized by Prof. John Ligon, Michigan Technological University.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

di Scalea, F.L. Strain in isotropic pin-joints: Experimental and numerical analysis. Exp Tech 22, 25–27 (1998). https://doi.org/10.1111/j.1747-1567.1998.tb02318.x

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1111/j.1747-1567.1998.tb02318.x

Search

Navigation