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http://dx.doi.org/10.7234/composres.2018.31.3.088

Effect to Material Strength Recovery of Stepped Patch Repair with Epoxy based Particle Reinforced GFRP Composites under Hygrothermal Environment  

Jung, Kyung-Seok (Major of Material Engineering, Graduate School, Korea Maritime and Ocean University)
Park, Soo-Jeong (Major of Material Engineering, Graduate School, Korea Maritime and Ocean University)
Kim, Yun-Hae (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University)
Publication Information
Composites Research / v.31, no.3, 2018 , pp. 88-93 More about this Journal
Abstract
In this study, damaged composite laminates were repaired by a stepped patch repair method using halloysite nanotube(HNT) and milled carbon(MC) reinforced composite materials with different amount of the particles. And the mechanical and structural effects of the particles on the interface between the damaged and repair surfaces were analyzed. At this time, after exposing them to a harsh environment of high temperature and humidity for a long time, the recovery rate of the material properties relative to the material forming the damaged plate was compared. As a result, at $70^{\circ}C$ high temperature distilled water, the hygroscopicity of the HNT/GFRP composites was significantly different from that of the MC/GFRP composites. Especially, 0.5, 1 wt. % HNT was added, the moisture absorption rate was the lowest and this was the factor that contributed to the mechanical strength increase. On the other hand, MC showed a high hygroscopic resistance only with a small amount, and the strength was different according to the action direction of the load, and the addition amount was also different.
Keywords
Halloysite nanotube; Milled carbon; Mechanical property; Recovery rate; Stepped patch repair;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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