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Proceedings Paper

Evaluation of thermally-aged carbon fiber/epoxy composites using acoustic emission, electrical resistance, contact angle and thermogram
Author(s): J. M. Park; P. S. Shin; J. H. Kim; H. S. Park; Y. M. Baek; K. L. DeVries
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Paper Abstract

Interfacial and mechanical properties of thermal aged carbon fiber reinforced epoxy composites (CFRP) were evaluated using acoustic emission (AE), electrical resistance (ER), contact angle (CA) and thermogram measurements. Unidirectional (UD)-composites were aged at 200, 300, and 400 °C to produce different interfacial conditions. The interfacial degradation was identified by Fourier transform infrared (FT-IR) spectroscopy after different thermal aging. AE and ER of UD composites were measured along 0, 30, 60 and 90 °. Changes in wavespeed, with thermal aging, were calculated using wave travel time from AE source to AE sensor and the changes in ER were measured. For a thermogram evaluation, the composites were laid upon on a hotplate and the increase in the surface temperature was measured. Static contact angle were measured after different thermal aging and elapsed times to evaluate wettability. Interlaminar shear Strength (ILSS) and tensile strength at transverse direction tests were also performed to explore the effects of thermal aging on mechanical and interfacial properties. While thermal aging of CFRPs was found to affect all these properties, the changes were particularly evident at 400 °C.

Paper Details

Date Published: 22 March 2018
PDF: 10 pages
Proc. SPIE 10596, Behavior and Mechanics of Multifunctional Materials and Composites XII, 105961N (22 March 2018); doi: 10.1117/12.2292668
Show Author Affiliations
J. M. Park, Gyeongsang National Univ. (Korea, Republic of)
Univ. of Utah (United States)
P. S. Shin, Gyeongsang National Univ. (Korea, Republic of)
J. H. Kim, Gyeongsang National Univ. (Korea, Republic of)
H. S. Park, Gyeongsang National Univ. (Korea, Republic of)
Y. M. Baek, Gyeongsang National Univ. (Korea, Republic of)
K. L. DeVries, Univ. of Utah (United States)


Published in SPIE Proceedings Vol. 10596:
Behavior and Mechanics of Multifunctional Materials and Composites XII
Hani E. Naguib, Editor(s)

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