ScholarWorks@경상국립대학교

초록

In order to replace conventional autoclave processes, leading aerospace manufacturers are actively developing a variety of Out-of-Autoclave (OOA) manufacturing techniques. Among these, Resin Transfer Molding (RTM) serves as a fundamental liquid composite molding process, aiming to achieve mechanical performance comparable to that of prepreg-based composites, while reducing manufacturing costs and enabling the replacement of conventional metallic components. In this study, the duct section of an electric multi-tail rotor was fabricated using the RTM process. Material characterization and process simulations were conducted to validate and optimize the manufacturing approach through experimental comparison. In particular, a Runner Model that accounts for the interfacial effects between the complex-shaped preform and mold surfaces was proposed. This model demonstrated excellent correlation with the actual resin filling time, achieving over 98% accuracy. The outcomes of this study significantly enhance the reliability of RTM process simulations and offer a practical framework that may serve as a core enabling technology for future OOA manufacturing strategies.

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