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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 7 — Mar. 1, 2009
  • pp: 1371–1381

Deformation-pattern-based digital image correlation method and its application to residual stress measurement

Jianxin Gao and Haixia Shang  »View Author Affiliations


Applied Optics, Vol. 48, Issue 7, pp. 1371-1381 (2009)
http://dx.doi.org/10.1364/AO.48.001371


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Abstract

To measure directly residual stresses by digital image correlation using hole drilling, the deformation pattern that is governed by the residual stresses is used to affine transform the image captured after the object is deformed. If the values of trial residual stress components are properly chosen, the image after affine transformation will have a maximum similarity to the original image. This turns the residual stress measurement issue into a pure numerical computational process, which leads to the direct output of residual stresses. Validation tests have proved the viability of the approach. The proposed concept and principle could be extended to other specific measurement tasks with known deformation patterns.

© 2009 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(120.4880) Instrumentation, measurement, and metrology : Optomechanics

ToC Category:
Image Processing

History
Original Manuscript: September 18, 2008
Revised Manuscript: February 5, 2009
Manuscript Accepted: February 5, 2009
Published: February 23, 2009

Citation
Jianxin Gao and Haixia Shang, "Deformation-pattern-based digital image correlation method and its application to residual stress measurement," Appl. Opt. 48, 1371-1381 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-7-1371


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References

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