Assessment of Selection of Suitable for Spar of the HumanPowered Aircraft Using COPRAS Method

Abstract

Generally speaking, while making decisions, it is more customary to rely on intuition rather than any form of numerical technique. In areas where there are many options and many factors impacting the choice, such as the selection of materials, a more precise approach would be necessary. It is necessary to understand the material's characteristics, price, design principles, and interactions while making mechanical parts. Material science has not only produced traditional materials such as metals, ceramics, and polymers but has also given rise to various novel materials like composites, smart (intelligent) materials, and functionally graded materials. A designer now has access to a wider range of materials than ever before thanks to the growth of knowledge. In these instances, a strategic choice must be made in order to satisfy all the functional specifications of the product while upholding client requests and preferences. The performance criteria of the component must be specified, along with a general description of the properties and processing needs of the primary material, As the first stage of the material selection process. Consequently, certain material types might be ruled out, while others are chosen as potential options for the component. The relevant material properties are subsequently listed and assigned a priority ranking. The best material can then be chosen using optimization techniques. The result of the COPRAS analysis is followed by Al 2024-T4 is the first rank, Carbon 63% Epoxy is last rank. Based on the analysis, the materials ranked highest for usage are as follows: Al 2024-T4 aluminum alloy, E-glass 73%-Epoxy, E-glass 56% Epoxy, and E-glass 65% Polyester. These selections have been carefully assessed and determined to be the most suitable options, taking into account their specific properties and how well they align with the intended application. The Al 2024-T4 aluminum alloy exhibits excellent strength-to-weight ratio and corrosion resistance, making it an ideal choice for structural components. E-glass 73%-Epoxy, E-glass 56% Epoxy, and E-glass 65% Polyester offer a combination of strength, flexibility, and durability, catering to various requirements within the application. The meticulous evaluation of these materials ensures that the chosen ones will deliver optimal performance and reliability in the designated context.