A systematic characterization approach for vacuum bag only prepregs towards an accurate process design

Arıkan, Muhammed Hasan and Eroğlu, Fatih and Eskizeybek, Volkan and Şükür, Emine Feyza and Yıldız, Mehmet and Şaş Çaycı, Hatice Sinem (2022) A systematic characterization approach for vacuum bag only prepregs towards an accurate process design. Materials, 15 (2). ISSN 1996-1944

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Aerospace-grade composite parts can be manufactured using Vacuum Bag Only prepregs through an accurate process design. Quality in the desired part can be realized by following process modeling, process optimization, and validation, which strongly depend on a primary and systematic material characterization methodology of the prepreg system and material constitutive behavior. The present study introduces a systematic characterization approach of a Vacuum Bag Only prepreg by covering the relevant material properties in an integrated manner with the process mechanisms of fluid flow, consolidation, and heat transfer. The characterization recipe is practiced under the categories of (i) resin system, (ii) fiber architecture, and (iii) thermal behavior. First, empirical models are successively developed for the cure-kinetics, glass transition temperature, and viscosity for the resin system. Then, the fiber architecture of the uncured prepreg system is identified with X-ray tomography to obtain the air permeability. Finally, the thermal characteristics of the prepreg and its constituents are experimentally characterized by adopting a novel specimen preparation technique for the specific heat capacity and thermal conductivity. Thus, this systematic approach is designed to provide the material data to process modeling with the motivation of a robust and integrated Vacuum Bag Only process design.
Item Type: Article
Uncontrolled Keywords: Prepreg; Process modeling; Resin rheology; Thermal properties
Divisions: Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Mehmet Yıldız
Date Deposited: 26 Aug 2022 17:34
Last Modified: 26 Aug 2022 17:34
URI: https://research.sabanciuniv.edu/id/eprint/43926

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