Design Optimization of a Braided Roof Frame Reinforcement by Process-Integrated Local Customization of Component Properties

Eschler, Eric; Miadowitz, Thomas; Zaremba, S.; Drechsler, Klaus

doi:10.1007/s10443-019-09790-6

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…where α ϵ (0,π/2). It follows from relations (12), (13), and ( 14) ω cr L ω torus R ¼ L r tg } , that implies tg α ¼ Rω torus rω cr . It follows from here…”

Section: Winding a Curved Part Of The Framementioning

confidence: 99%

“…6 The most commonly used production processes of FRP composite frames are braiding technology and filament winding. Braiding enables high adhesion of fibers to the frame surface, even in the case of a geometrically complicated frame shape, 13,14 which enables the minimal risk of composite cracking during its loading. For special applications, it is possible to combine materials in partial directions (for example, carbon fibers/aramid fibers), or it is possible to exchange standard fibers to support synthetic yarn in one direction (unidirectional braiding).…”

Section: Introductionmentioning

confidence: 99%

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Winding optimization of composite frame by dry fiber rovings

Mlýnek

Petrů

Ryvolová

et al. 2022

Journal of Industrial Textiles

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Light-weight fibers reinforced polymer (FRP) composite frames are essential parts of vehicles body in the aerospace and automotive industries. Composite frames are often designed in complex curved 3D geometry through the dry winding process. The winding process of homogeneously wound-up layers of fibers without overlapping and gaps is the main challenge in the fabrication of frames with consistent thickness and acceptable quality. In this study, an industrial robot and winding head are set with a novel optimum process to wind the dry fiber with the specified angles on the frame, to fabricate it with minimum overlapping and local commulation of fibers, yet without gaps. Mathematical models and algorithms are developed to determine the optimal number of simultaneously wounds rovings of fibers in a given layer. In addition, this study addresses the optimum dry winding of curved parts of frames that form a torus geometry. It is shown that the combination of layers of rovings wound successively on the frame at angles of 45°, 90° (i.e. the rovings are laid along with the frame), and −45°, is the most used variant of winding that provides the composite frame with higher strength. Results indicated that an optimal selection of the number and width of the rovings minimizes the overlap of the wound rovings, which saves up to 20% of the utilized fibers. The derived theory is verified on practical tests and experiments, which confirms the development of new suitable procedures to improve the fabrication of FRP composite frames.

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“…where α ϵ (0,π/2). It follows from relations (12), (13), and ( 14) ω cr L ω torus R ¼ L r tg } , that implies tg α ¼ Rω torus rω cr . It follows from here…”

Section: Winding a Curved Part Of The Framementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Winding optimization of composite frame by dry fiber rovings

Mlýnek

Petrů

Ryvolová

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

show abstract

“…The results of the subsequent optimisation exercise produced multiple design variants that provided an informative insight into the compromise between three objectives, i.e., mechanical strength, weight and mould filling time. In a separate study, Eschler et al [24] performed a multi-objective design optimisation for a braided automotive roof beam. The problem was defined using four braiding parameters aimed at improving the local mechanical properties through the selective addition of axial tows.…”

Section: Introductionmentioning

confidence: 99%