LSCAE LAB

논문 초록 (Abstract)

This paper presents a study of a lightweight structural design technology that replaces the existing metal carbody with carbon/epoxy laminate composites and sandwich composites to increase the energy efficiency of the EMU(Electric Multiple Unit) carbody. Carbon/epoxy laminate composites were designed in consideration of various stacking sequences because it is necessary to keep the bending and twisting rigidity and strength levels the same or higher compared to the existing metal carbody. A stacking sequence of [0°/45°/90°/-45°] 2s was finally selected through a prediction of the material properties and a structural analysis according to the stacking sequences. The selected composite stacking sequence was applied to the roof, cantrail, and cap module in consideration of simplification of the manufacturing process and flexibility of the modular design. The EMU carbody, which was replaced with carbon/epoxy laminate composites and sandwich composites, was evaluated in terms of structural integrity in accordance with the EN12663-1 specification. The structural integrity was confirmed to be equal to or higher than that of the existing metal carbody. In addition, it was found that a weight reduction effect of approximately 40.34% for the roof and cantrail structures and approximately 64% for the cap module structure could be obtained by a lightweight structural design through material substitution.