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Öğe Effect of pressing pressure on density and hardness of powder miscanthus reinforced brake pads(Trans Tech Publications Ltd, 2014) Unaldi M.; Kus R.The aim of this paper is to develop new natural fibre reinforced for automotive brake pad application. For this purpose, new brake pad sampleswere produced using Miscanthus as reinforcement ingredient. The other ingredients are Cashew, Alumina, Phenolic Resin, and Calcite. Three different laboratory formulations were prepared with varying Miscanthus fibre contents from 10, 25, and 40 (wt) and these formulations were moulded four different moulding pressure values such as 50, 100, 200, and 300 MPa. Sieve analysis, density, apparent density, and hardness properties of brake pad samples produced are examined. © (2014) Trans Tech Publications, Switzerland.Öğe Fractal geometry of internal thread surfaces manufactured by cutting tap and rolling tap(Elsevier Ltd, 2020) Talu Ş.; Kulesza S.; Bramowicz M.; Sağlam H.; Kus R.This study presents briefly the application of fractal geometry in internal threads surface characterization to reveal defect fine structures of the internal thread geometry caused by the manufacturing process. The surface texture characteristics of ten internal thread samples M12 × 1.75 of low carbon steel Ç1020, manufactured by cutting tap and rolling tap were analyzed and discussed through comparative analyses of the experimental data. The surface characteristics of samples were analyzed using scanning electron microscopy (SEM) and were found that surface texture characteristics (Str – surface anisotropy ratio and D – fractal dimension) are different for the thread specimens. © 2019Öğe Investigation of friction coefficient for Twaron-Reinforced brake shoe materials(Trans Tech Publications Ltd, 2017) Demirhan Y.Z.; Kus R.After the adverse effects of asbestos used in brake shoes on vehicles were come up, the researches on ecological shoe material have been carried out by many researchers. From this point forth, four different twaron-reinforced composite materials, which could be brake shoes, were produced in this study. Samples were produced in double acting press at a pressure of 100 MPa at 1600C by mixing the components used in powder form in a mixer. The samples were cured at 1600C for 6 hours. After curing, produced samples and those taken from commercial shoes were compared by performing hardness pin-on-disc wear tests (ASTM G99-95). When the results are evaluated in terms of hardness, it was observed that 20% twaron-reinforced sample has the highest hardness (116,88 Rockwell-R), but when evaluated in terms of friction, it was seen that while 5% twaronreinforced sample satisfies highest friction coefficient, 10% twaron-reinforced sample exhibits close values to the commercial brake shoe at varying loads and showed a stable friction performance. © 2017 Trans Tech Publications, Switzerland.