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Proceedings Paper

Fatigue damage evaluation of short fiber CFRP based on phase information of thermoelastic temperature change
Author(s): Takahide Sakagami; Daiki Shiozawa; Yu Nakamura; Shinichi Nonaka; Kenichi Hamada
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Paper Abstract

Carbon fiber-reinforced plastic (CFRP) is widely used for structural members of transportation vehicles such as automobile, aircraft or spacecraft, utilizing its excellent specific strength and specific rigidity in contrast with the metal. Short carbon fiber composite materials are receiving a lot of attentions because of their excellent moldability and productivity, however they show complicated behaviors in fatigue fracture due to the random fibers orientation. In this study, thermoelastic stress analysis (TSA) using an infrared thermography was applied to the evaluation of fatigue damage in short carbon fiber composites. The distributions of the thermoelastic temperature change was measured during the fatigue test, as well as the phase difference between the thermoelastic temperature change and applied loading signal. Evolution of fatigue damages was detected from distributions of thermoelastic temperature change according to the thermoelastic damage analysis (TDA) procedure. It was also found that fatigue damage evolution was clearly detected than ever by the newly developed thermoelastic phase damage analysis (TPDA) in which damaged area was emphasized in the differential phase delay images utilizing the nature that carbon fiber show opposite phase thermoelastic temperature change.

Paper Details

Date Published: 5 May 2017
PDF: 6 pages
Proc. SPIE 10214, Thermosense: Thermal Infrared Applications XXXIX, 102140M (5 May 2017); doi: 10.1117/12.2262972
Show Author Affiliations
Takahide Sakagami, Kobe Univ. (Japan)
Daiki Shiozawa, Kobe Univ. (Japan)
Yu Nakamura, Kobe Univ. (Japan)
Shinichi Nonaka, DIC Corp. (Japan)
Kenichi Hamada, DIC Corp. (Japan)

Published in SPIE Proceedings Vol. 10214:
Thermosense: Thermal Infrared Applications XXXIX
Paolo Bison; Douglas Burleigh, Editor(s)

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