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Optical Engineering

Improved digital speckle correlation method and its application in fracture analysis of metallic foil
Author(s): Yilan Kang; Huaiwen Wang
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Paper Abstract

As a rapidly developing technique of photomechanics, the digital speckle correlation method (DSCM) has attracted attention for its advantages of noncontact, real time, whole field and wide measuring range, etc. Raising the speed of convergence is a developing direction of the method for its great calculation volume. We present an improved DSCM by introducing an optimization theory. It can reduce the computational workload and speed the convergence velocity. This method is used to measure the displacement fields and strain fields in the crack tip region of thin foil, and the stress intensity factor is obtained by the experimental method. Applications show that the DSCM is an effective experimental technique for investigating the mechanical behavior of thin foil materials.

Paper Details

Date Published: 1 November 2002
PDF: 6 pages
Opt. Eng. 41(11) doi: 10.1117/1.1511749
Published in: Optical Engineering Volume 41, Issue 11
Show Author Affiliations
Yilan Kang, Tianjin Univ. (China)
Huaiwen Wang, Tianjin Univ. (China)


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