Strength Analysis of N219 Seaplane Floats with Aluminium Foam Sandwich Material Using Finite Element Method

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This study investigates the structural feasibility of aluminum foam sandwich (SAF) materials for the N219 amphibious aircraft floats using finite element method (FEM) simulations. Focused on enhancing crashworthiness, the analysis evaluates energy absorption under low-speed impacts (62–76 knots) and partial vertical loads (3.7–4.8 tons), comparing AFS with varying core thicknesses (3–7 mm) against conventional Aluminium 6061-T6. Results demonstrate that the 7 mm AFS core significantly reduces von Mises stress (134.5 MPa at 4.8 tons, 62 knots) compared to Al 6061-T6 (210.7 MPa under identical conditions), while improving specific energy absorption (SEA) and crash force efficiency (CFE). Validated against experimental data with a 5.71% error margin, the simulations confirm compliance with FAA and ICAO safety standards. The study highlights AFS’s potential to enhance lightweight design without compromising structural integrity, offering a novel solution for Indonesia’s amphibious aircraft development. This innovation addresses critical challenges in buoyancy, hydrodynamic stability, and crashworthiness for archipelagic transportation.

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Engineering Headway (Volume 39)

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35-44

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July 2026

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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