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2. Methods Corner laminates were manufactured using VBO prepreg processing. Two extrinsic factors, mold design and pressure application methodology, were considered in detail. These factors are specifically relevant to non-flat geometries, and can be adjusted feasibly within a production environment. In addition, several intrinsic factors, including prepreg product and laminate thickness, were also varied. Mold Design. The typical tooling used in this study is shown schematically in Figure 1. A total of six tools were used to manufacture parts. Each corner angle was associated with two tools, which featured sharp corners or corners with finite radii of curvature. Each tool included both concave and convex corner regions, allowing concave and corner laminates to be manufactured simultaneously. Specific corner angles (30o, 45o, 60o) were chosen to evaluate the effect of increasing geometric complexity on laminate quality, while various corner radii (0 mm, 6.35 mm, 9.53 mm, 12.7 mm) were selected to verify the effect of local geometric discontinuity. The tools were machined from a single billet of aluminum to avoid leaks, and surfaces were fine-polished. Figure 1: Schematic illustration of mold design and bagging configuration DOI: 10.1002/pc.23773 7PDF Image | Vacuum Bag-Only Prepregs
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