Utilization of finite element analysis for rapid curing of fiber-reinforced polymers in a novel two-phase curing technique for braided rebars

Abstract

This study focused on determining the capability of a proposed two-step curing process for composite rebars production. A finite element analysis is carried out on rapid curing of fiber-reinforced polymer rebars during a continuous braid trusion manufacturing process. This process combines pultrusion and braiding techniques to produce fiber-reinforced polymer rebars. The system uses a novel two-step curing technique to obtain a uniform cure profile. This is achieved by embedding small diameter steel wires within the core of the rebar. In the first step, as the rebar passes through an induction coil, a curing radially in the outward direction is initiated due to the induction coil. In the second step, the induction-initiated curing rebar enters a series of ovens, initiating radially inward curing. The resulting fiber-reinforced polymer rebars can be used as alternative to steel reinforcement in applications where steel cannot be utilized due to its corrosive or metallic nature. The result of this study showcased the importance of induction unit in obtaining a uniform cure profile.