Mechanical Properties of Unidirectional Aramid/Epoxy Composites
Vol. 57, No. 1, pp. 57-62,
Feb. 2020
10.12772/TSE.2020.57.057
PDF
Abstract
As fiber-reinforced composite materials are lightweight, easy to install and excellent in performance, these are used for repairing civil engineering structures. In particular, structural reinforcement by aramid has advantages such as high strength, high elasticity, durability, electrical insulation, construct ability, costs and so on. In this study, aramid fibers were used for the warp yarns, and glass fiber coated with LMF (Low Melting Fiber) and silk blended with LMF were used for the weft yarns. Using this, the unidirectional aramid fabric for structural reinforcement was woven. Composite materials were prepared by using epoxy resin and their mechanical properties were tested. In addition, the impact resistance of the multi-ply laminate aramid composite by external impact was tested, and according to lamination method, the mechanical properties of the aramid composite were comparatively analyzed. The performance of aramid specimens using glass fiber coated with LMF as
weft yarns was superior in all performances such as tensile properties, flexural properties, and impact strength. Even when silk/LMF weft yarn was used, it showed similarly high mechanical properties. The strength of the three types of laminated patterns was compared. The strength was the best at 0 o/0 o/0 o, and similar at 0o/45o/90o, and the strength at 0 o/90o/0 o decreased by more than 26%. The applicability of silk as a industrial fiber was tested, and the mechanical properties of unidirectional aramid fabrics were analyzed.
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