Journal Published Online: 01 December 1985
Volume 7, Issue 4

Detection of Delamination Onset in a Composite Laminate Using Moiré Interferometry



Moiré interferometry was used to detect and measure delaminations in a graphite-epoxy composite laminate. The laminate used was a [(±30)2/¯9¯0]s layup. A uniform strain was subtracted from the full-field moiré pattern by changing the frequency of the reference grating. This technique accentuated the nonuniform strains allowing very high resolution measurements of strain concentrations. These strain concentrations include free-edge effects, resin rich regions and delaminations.

Author Information

Wood, JD
Virginia Polytechnic Institute and State University, Blacksburg, VA
Pages: 8
Price: $25.00
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Stock #: CTR10308J
ISSN: 0884-6804
DOI: 10.1520/CTR10308J