Design, selection, and evaluation of mechanisms for various applications. Topics include planar and spatial linkages, cams, gears, planetary and non-planetary gear systems, linkage synthesis, linkage dynamics, and an introduction to robotic manipulators using vector, matrix, and complex number methods. Projects involve using mathematics software for analysis and plotting of motion and inertial forces in planar and spatial linkages. CIS 101, Mech 234

Mechanical engineering department

Friction and wear of a piston ring/cylinder liner at the top dead centre: Experimental study and modelling

Optimization of the operating parameters based on Taguchi method in an SI engine used pure gasoline, ethanol and methanol

Friction and wear studies between cylinder liner and piston ring pair using Taguchi design method

The influence of bulges produced by laser surface texturing on the sliding friction and wear behavior

The effects of coating materials in spark ignition engine design

In this study, the weight loss of brake pad in automotive brake system was investigated using Taguchi’s method. Wear tests of the brake pad versus cast iron disk were carried out for a dry sliding condition in a so-called a pad-on-disk rig. The wear tests were realized at the sliding speeds of 7, 9, and 11 ms−1 and under the pressures of 0.5, 1, and 1.5 bars. The obtained lowest weight loss for the brake pad contains the copper flake volume fraction of 20 % by weight under the same test conditions. The experimental results are transformed into a signal-to-noise (S/N) ratio using Taguchi method. Volume fraction of copper flake, pressure, and interaction between volume fraction of copper flake and pressure exert a great effect on the weight loss, at 58.11, 16.35, and 20.86 %, respectively. The estimated S/N ratios of the weight loss, using the optimal testing parameters, were calculated and a good agreement was observed between the predicted and actual weight loss, with a confidence level of 99.5 %.

Optimization of tribological parameters for a brake pad using Taguchi design method

In this study, AISI 1040 steel was boronized using the packed boronizing technique. Processes were carried out at the temperature of 950°C for 2 and 4 h of treatment. The wear resistance model for AISI 1040 steel was developed in terms of boronizing time, applied load, sliding distance and sliding speed using the Taguchi method. Wear tests were carried out using a pin-on-disc type of apparatus under different conditions. The orthogonal array, signal-to-noise (S/N) ratio and analysis of variance are employed to investigate the optimal testing parameters. The experimental results demonstrate that the boronizing time was the major parameter among the controllable factors that influence the weight loss of AISI 1040 steel. For AISI 1040 steel, the boronizing time had the greatest effect on the wear, followed by sliding distance. The applied load and sliding speed had a much lower effect. The optimal combination of the testing parameters could be determined. A good agreement between the predicted and actual weight loss was observed within ±3.5%.

	 

	Key words: Taguchi method, boronizing, wear test.

https://www.academicjournals.org/article/article1380630068_Ficici et al.pdf

Applications of taguchi design method to study wear behaviour of boronized AISI 1040 steel

Catalysts of a gasoline engine become active when the exhaust temperature exceeds 200 o C. Cold start HCs are extremely high until catalysts reach the light-off temperature. Determination of optimum place and necessary time of the catalyst to reach this temperature is of vital importance. Interaction between exhaust gas and inner wall, along with the exhaust pipe needs to be well-understood. The interaction can be computed by numerical solutions based on fluid dynamics and heat transfer equations depending on time and location. In the study, three-dimensional transient CFD analysis has been performed for the whole exhaust pipe. The results of CFD analysis was in very good agreement with those of experimental data. Also, an optimal catalyst location was determined by the CFD analysis performed in transient regime. Heat transfer phenomena were also investigated analytically using different Nusselt number correlations given in the literature. Analytic results were compared with those of the experimental data. Each correlation gave reasonable results with different range of Reynolds number.

/pdf/cfd-and-experimental-analysis-on-thermal-performance-of-c3xopmixor.pdf

Cfd and experimental analysis on thermal performance of exhaust system of a spark ignition engine

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