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Optimization of Fiber Arrangement Around Circular Hole Considering Curve Shaping by AFP

KENTA MITSUI, RYOSUKE MATSUZAKI, YOSHIYASU HIRANO, AKIRA TODOROKI, YOSHIHIRO SUZUKI

Abstract


In the fiber reinforced composite laminates, breakage due to stress concentration around the open-hole is a big problem. It cannot be said that conventional linear lamination can fully exploit the characteristics of anisotropic material, but there is a possibility that this stress concentration can be reduced by curved lamination by automated fiber placement (APF). In this study, we optimized the curved prepreg tape arrangement by genetic algorithm (GA) so that the strength of the open-hole-plate would be improved, on the premise that the prepreg tape could be laminated in a curved shape by AFP. As the result of optimization, the strength could be improved with respect to linear lamination. The arrangement was such that the bottom tape concentrates on top of the circular hole edge. In addition, as the maximum allowable curvature was increased, the strength was improved. This result could be used to improve the strength around open-holes such as windows of aircraft.


DOI
10.12783/asc33/26032

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