Springback behavior of fiber metal laminate (FML) composites in press brake forming process

Authors : Ahmed Ozan Örnekci, Seçil Ekşi

Pages : 580-587

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Publication Date : 2025-08-25

Article Type : Research Paper

Abstract :The brake forming process is suitable for producing fiber metal laminate (FML) composites. However, the springback that occurs during braking causes severe problems in the final dimensional tolerance of the composite laminate. In this study, the springback behavior of fiber metal laminate (FML) composites in the v-shaped brake-forming process were experimentally investigated. In FML composites, 6061-T6 Aluminum was used on the outer surfaces, and carbon, glass, carbon/glass, and aramid fiber-reinforced epoxy composite plates were used in the inner layers. The effects of bending angle and die width parameters on springback behavior in the v-shaped brake-forming process were examined. Forming processes were carried out with bending angles of 140°, 150°, and 160° and two different mold widths: 16 and 20 mm. As a result of experiments, the highest springback was observed in the aluminum-carbon fiber-aluminum composite plate with 15.1° and the lowest springback was observed in the aluminum-glass/carbon fiber-aluminum composite plate with 0.4°. The highest spring-go was obtained in the aluminum-aramid fiber-aluminum composite plate with -1.7°, while the lowest spring-go was obtained in the aluminum-glass fiber-aluminum composite plate with -0.3°.
Keywords : FML, Geri yaylanma, İleri yaylanma, Pres şekillendirme

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