Detection and measurement of impact damage in thick carbon fibre reinforced laminates by transient thermography

Richard J Ball, Darryl P Almond

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)
163 Downloads (Pure)

Abstract

Transient thermography (TT) images of impact damaged 3.44, 8.66 and 13.76 mm thick composites, from the impact face and rear face, are compared with the corresponding ultrasonic c-scan (UCS) images. Comparisons of apparent delamination area and size were made using novel image analysis techniques. The defect image sizes were also compared with crack lengths obtained from a selected number of specimens that were sectioned. For all composite thicknesses, the UCS damage area was proportional to the impact energy. The damage area obtained by TT from the front faces of the specimens did not correlate to the UCS damage areas although there was a correlation for the rear face damage on 3.44 and 6.88 mm thick specimens. Crack lengths obtained from sectioning showed that UCS damage length was equal to the maximum crack length and back and front sub surface cracks corresponded to back and front TT images.
Original languageEnglish
Pages (from-to)165-173
Number of pages9
JournalNDT and E International
Volume31
Issue number3
DOIs
Publication statusPublished - Jun 1998

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