ANALYSIS OF LIGHTWEIGHT STRUCTURE BASED ON METASTRUCTURE AS ENERGY ABSORPTION ON AIRCRAFT SUB-CARGO

• Main Author: Satria Yudhistira, Nanda
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/57144
• Institution: Institut Teknologi Bandung

Research on geometry and optimization of the use of metastructures as an alternative to energy-absorbing structures in aircraft sub-cargos is based on increasing the crashworthiness of the aircraft. Accidents on planes often occur during the takeoff and landing phases. These accidents cause damage to the subcargo section of the aircraft and can threaten passengers' safety. Therefore, in this study, the use of lightweight structures based on metastructures for energy absorption in the sub-cargo section of the aircraft will be studied because this structure is lightweight and has an excellent ability to absorb energy. The ability of the lightweight structure based on the metastructure will be evaluated dynamically using the finite element method to obtain specific energy absorption (SEA). In this case, there will be four control factors including geometry, outer height, angle, and material. Each control factor has three levels, which, later, an analysis will be conducted using Analysis of Variance (ANOVA) and optimized using the Taguchi method with the outputs of structure sensitivity to control factors and the optimum design of the structure. The analysis was carried out on unit cells. Five types of unit cells with metastructure-based geometries were tested, including cubic, tetrahedron, double-arrowed auxetic (DAA), double-U (DUH), and reentrant. Then, the optimized unit cell is applied to the sub-cargo of the aircraft. The airplane model used is the back of the Airbus A320 fuselage. The simulation results show that the energy-absorbing structure with DAA type on the sub-cargo produces 27.59 kJ/kg SEA. This SEA value has increased by 48% when compared to the SEA produced by the half-tube structure. These results indicate that the structure with the DAA type can become an alternative energyabsorbing structure in aircraft in the future.