A simple repair method for GFRP delamination using ultraviolet-curable resin |
| |
Authors: | Limin Bao Takuya Okazawa Anchang Xu Jian Shi |
| |
Affiliation: | 1. Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda-shi, Nagano Prefecture 386-8567, Japan;2. College of Textile Science and Engineering, Wuhan Textile University, 1st FangZhi Road, Wuhan 430073, P.R. China;3. Faculty of Systems Science and Technology, Akita Prefectural University, 84-4 Ebinokuchi Aza, Tsuchiya, Yurihonjo-shi, Akita Prefecture, Japan |
| |
Abstract: | Fiber-reinforced plastic (FRP) composites are widely used in engineering because of their high strength and light weight in comparison to monolithic metal alloys. They are mostly used in laminate form and are stronger within layers than between layers, making them prone to cracking and peeling. This type of structural degradation can be dangerous during operation. For this reason, research on FRP composites with the ability to self-repair has attracted much attention. In this study, we developed a new method to repair glass fiber-reinforced plastic (GFRP) composites by using ultraviolet-(UV) cured resin. As GFRP composites are UV transmissive, the repair process can be carried out externally by exposing the damaged part to UV light. The transmittance of EP GFRP is about 40%. Holes were pre-drilled with wires in order to facilitate the injection of UV resin between the layers of the composite, and this process was accomplished without degrading the mechanical properties of the material. A double cantilever beam (DCB) test was performed on the GFRP composite to induce interlaminar fracturing. UV-curable resin was then injected between the layers of the composite through a series of pre-drilled holes. Following this repair, the DCB test was performed again to evaluate the repair rate. A compressive after impact (CAI) test was also performed on the GFRP composite to induce delamination. Compressive strength before and after the repair was also evaluated. |
| |
Keywords: | GFRP repair method ultraviolet-curable resin DCB test CAI test |
|
|