Journal
COMPOSITE STRUCTURES
Volume 255, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.112871
Keywords
Friction riveting; Composite laminate; Thermoplastic composite; Accelerated aging; Hydrothermal effect; Mechanical fastening
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Funding
- National Council for Scientific and Technological Development CNPq (Brazil) [200695/2015-0]
- Austrian aviation program TAKE-OFF
- Austrian Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology BMK
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This study shows that carbon fiber reinforced polyether-ether-ketone friction riveted joints have a certain resistance to hydrothermal aging, with an increase in mechanical performance observed as exposure time increases.
In this paper, the sensitivity of carbon fiber reinforced polyether-ether-ketone friction riveted joints to hydrothermal aging was assessed, addressing the degradation mechanisms and post-aged quasi-static mechanical behavior of the joints. The joints were exposed to 71 degrees C and 95% relative humidity for 28 days. Despite the oxidation of the metallic nut and washer as well as cavitation and degradation of the composite, a 23% increase of joint mechanical performance was observed after 28 days of exposure. It is believed that the temperature and water uptake drove matrix post-crystallization at the surface of the fibers, which led to local strengthening of the composite in the rivet surrounding and, consequently, improved the joint residual strength.
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