ANALISIS KELAIKAN TABRAK STRUKTUR KOLOM HIBRID ALUMINUM-CFRP DALAM KASUS PEMBEBANAN LATERAL

• Main Author: Adiwiguna, Tias
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/48040
• Institution: Institut Teknologi Bandung

In transportation industry, the need for thin wall structures as energy absorbers is very high. The use of thin wall structures can reduce vehicle weight, which means reducing fuel use and exhaust gas emissions, making vehicles more efficient and environmentally friendly. In addition, the ability to absorb energy and bend resistance in thin wall structures is needed to minimize the risk of injury that can be experienced by vehicle users during an accident. In this study, a numerical study of the crashworthiness behavior of aluminum-CFRP hybrid structures under lateral loads, with the initial shape of a circular cross section using LS-DYNA software and validated with the results of sun’s experiments. This study aims to determine the ability osf the column structure to withstand lateral loads in terms of bending resistance, material strength and energy absorption. After validation, parametrics study is carried out by varying a number of physical parameters such as the number of composite layers, aluminum thickness, direction of the composite fiber, column diameter and column cross section shape. Based on numerical studies, the strength of the hybrid column is better than the single material column. The addition of the composite layer to the aluminum column increased bending resistance by 6.7%, material strength by 6.7% and increased energy absorption by 17%. This happens because hybrid columns have high strength and rigidity as composite columns with the same resistance as aluminum columns. Based on parametric studies, the number of composite layers, the thickness of aluminum and the direction of the composite fiber affect the resistance to bending, material strength and energy absorption. The ability of the column structure increases with the increasing number of composite layers and the addition of aluminum thickness. In addition, the more precise the fiber is directed at the principal direction, the structural ability to withstand the load will increase. The change in column diameter only affects the structure's ability to absorb energy. Changing the geometry of the column's cross section into a square column increases bending resistance by 24.4%, material strength by 24.4% and absorbed energy by 10.6% compared to the circular column.