Yazar "Avcu, Adem" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Application of the MULTIMOORA Method to Evaluate Performance Results of Red Mud Reinforced Bronze Matrix Brake Pads
    (Society of Automotive Engineers Turkey, 2024) Avcu, Adem; Kuş, Hüsamettin; Sugözü, İlker
    The objective of this study is to investigate the effectiveness of the MULTIMOORA method strengthened with AHP to select the most suitable pad material among metal matrix composite brake pad materials reinforced with different proportions of red mud according to the criteria determining the efficiency of brake performance. For this purpose, five different brake pad samples reinforced with red mud, an industrial waste, at different weight ratios (0%, 2%, 4%, 6%, 8%) were produced and the physical, mechanical, and tribological properties of the produced materials were characterized. Tribological characterization tests were carried out in accordance with TSE 555 using a specially designed brake dynamometer. The average coefficient of friction, specific wear rate, friction stability, hardness, density, and TRS values, which represent important performance indicators of the pad material, were used as criteria for the selection of pad material. According to the AHP method, the importance levels of these criteria in terms of brake performance were determined as 0.423, 0.205, 0.205, 0.088, 0.051, and 0.028, respectively. As a result of the evaluation made using the MULTIMOORA and MOOSRA method, it was determined that the RM-8 sample showed the best result in terms of brake performance among all samples. In addition, this material was followed by RM-6, RM-4, RM-0 and RM-2 samples, respectively. The findings of this study indicate that the MULTIMOORA method is an effective and reliable approach for selecting the optimal pad material among alternatives, according to the specified criteria. © 2024 Society of Automotive Engineers Turkey. All rights reserved.
  • [ X ]
    Öğe
    Red Mud Ratio Effects on the Tribological Performance of Fly-Ash-Reinforced Bronze Matrix Brake Pad Material
    (Springer, 2024) Kus, Husamettin; Avcu, Adem; Sugozu, Ilker
    Different amounts of red mud (0%, 2%, 4%, 6%, and 8%) were added to bronze matrix brake pad material reinforced with 12% fly ash and then hot-pressed at 800 degrees C and 40 MPa for 5 min. Wear-friction tests were conducted to determine the friction coefficient and specific wear rate, which are important indicators for evaluating the performance of brake pad samples. For all samples, the hardness and density were determined, fractured surfaces and microstructures were examined, and transverse rupture strength (TRS) was calculated using a three-point bending test. The hardness values of the samples increased with increasing red mud content, and their density values slightly decreased. TRS values of the samples increased with up to 4% red mud addition, but decreased when above 4%, and the friction coefficient of the brake pad samples decreased with an increase in red mud content. Moreover, all samples containing red mud, except the sample containing 2% red mud, showed a lower specific wear rate than the bronze matrix brake pad material reinforced with 12% fly ash. The worn surfaces of the specimens were also examined using scanning electron microscopy (SEM) and a 3D optical profilometer.