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Title: Tap testing of composites benchmarked with digital shearography
Authors: Gryzagoridis, Jasson 
Findeis, DM 
Keywords: benchmarking;coin/tap testing;composite materials;delaminations;digital shearography;laminates;non-destructive testing;sandwich composites;voids
Issue Date: 2013
Source: Gryzagoridis, J., & Findeis, D. (2014). Tap testing of composites benchmarked with digital shearography. Insight-Non-Destructive Testing and Condition Monitoring, 56(1), 35-38.
Abstract: This paper reports on two non-destructive testing techniques employed to detect subsurface defects in composite materials of both the monolithic and sandwich types. Making use of the NDT techniques named in the title of this paper, digital shearography was used to benchmark the results obtained through the tap testing method. The tap testing was performed using the Mitsui Woodpecker WP-632AM, a handheld automated impact instrument that displays the defects' positional data (X-Y coordinates) on a PC in real time. The versatility and ease of use of the Woodpecker is abundantly demonstrated and comparisons with the results obtained using digital shearography on the same test specimens have given an indication of its accuracy.
Appears in Collections:Eng - Journal articles (DHET subsidised)

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