Abstract
Multiple criteria decision-making method (MCDM), called balancing and ranking method, is employed for the ranking of five non asbestos fiber reinforced organic friction materials (FMs). This variant of MCDM uses three steps to derive a transitive overall final order of a finite set of options. First, an outranking matrix is derived in which pairwise comparison indicates the frequency with which one option is superior to all other options based on each criterion. Second, the outranking matrix is triangularized to obtain an implicit pre ordering or provisional order of options. Third, the provisional order of options is subjected to various screening and balancing operations that require sequential application of a balancing principle to the advantage and disadvantage table.
Five FMs based on five different phenolic resins are evaluated on Krauss friction tester according to ECE R-90 regulation (Economic Commission for European regulation). Resins used for friction composites are; (i) straight phenolic resin, (ii) alkyl benzene modified resin, (iii) cashew nut shell liquid modified resin, (iv) NBR modified resin, and (v) linseed oil modified resin. The various performance criteria selected for the analysis are: performance-μ,% recovery in μ,% Fade in μ, wear, and temperature rise in the rotor disc. After optimization of various performance parameters of five FMs it was observed that the alkyl benzene modified phenolic resin composite performed well and linseed oil modified phenolic resin based composite was poor. The order obtained after evaluating this method complies with the results presented theoretically.
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