Analysis of Materials Used in Spar of Human Powered Aircraft by TOPSIS Method

Abstract

The process of design is a sequential decision-making endeavor that strives to create a successful product while considering technological, societal, and economic constraints. Regarding product design, meeting two fundamental requirements is vital for a successful product. First, it should fulfill all functional or design specifications. Second, it must be economically competitive. In achieving these goals, the careful selection of the materials used in the product plays a critical role. It is important to consider a variety of criteria while choosing materials. These variables encompass a wide range of factors, spanning from physical, mechanical, and electrical characteristics to corrosion resistance and financial aspects. However, when it comes to mechanical design, the primary emphasis lies in the mechanical qualities. Strength, stiffness, toughness, hardness, density, and creep resistance stand out as the most critical material characteristics that frequently arise during the materials selection processes. Making decisions takes information and always involves some level of risk and uncertainty. A common element of the design activity is choosing between possibilities. The result of the TOPSIS analysis is followed by Al 7075-T6 is rank nine, Al 2024-T4 is tenth rank, Ti–6Al–4V is fifth ranked, Ti–2Fe–3Al is ranked second, S-glass 70% Epoxy cont. fibers is rank fourth, S-glass 70% Epoxy fabric is eight ranked, Carbon 63% Epoxy is first, Aramid 62% Epoxy is third, E-glass73%-Epoxy is sixth, E-glass 56% Epoxy is seventh, and for E-glass 65% Polyester is eleventh. The result of the analysis shows that the best materials used Carbon 63%-Epoxy alloy followed by Ti–2Fe–3Al, Aramid 62%-Epoxy, S-glass70%-Epoxy cont. fibers.