A fuzzy logic based PROMETHEE method for material selection problems

Material selection is a complex problem in the design and development of products for diverse engineering applications. This paper presents a fuzzy PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluation) method based on trapezoidal fuzzy interval numbers that can be applied to the selection of materials for an automotive instrument panel. Also, it presents uniqueness in making a significant contribution to the literature in terms of the application of fuzzy decision-making approach to material selection problems. The method is illustrated, validated, and compared against three different fuzzy MCDM methods (fuzzy VIKOR, fuzzy TOPSIS, and fuzzy ELECTRE) in terms of its ranking performance. Also, the relationships between the compared methods and the proposed scenarios for fuzzy PROMETHEE are evaluated via the Spearman’s correlation coefficient. Styrene Maleic Anhydride and Polypropylene are determined optionally as suitable materials for the automotive instrument panel case. We propose a generic fuzzy MCDM methodology that can be practically implemented to material selection problem. The main advantages of the methodology are consideration of the vagueness, uncertainty, and fuzziness to decision making environment

Protective coatings for optical surfaces

Thin films and coatings are a backbone for optical applications in industry, medical equipment, automotive construction, building sector, even in household. Thin films applied on the substrate such as on glass or polymers, for example, polycarbonate, enable the substrate to gain beneficial functions which can improve its energy saving properties, optical transparency and operational life span. This chapter will focus on the application of protective coatings and some evaluation methods for characterizing and optimizing the coating quality

Protective coatings for durability enhancement of optical surfaces

Thin films and coatings are a backbone for optical applications in industry, medical equipment, automotive, building and communication sectors, as well as in household and consumer products. Thin films applied on the substrate, such as glass or polymers, for example, polycarbonate, enable the substrate to gain beneficial functions which can improve its energy saving properties, optical transparency, and operational life span. This chapter focuses on the application of protective coatings on optical systems with an emphasis on the methods for characterizing and optimizing the coatings quality, in particular their mechanical and tribological performance, and environmental stability