...Yuankai Zhou; Zhiyong Wang; Xue Zuo Running-in quality can be improved by optimizing the running-in parameters (load, speed, and running-in time). The relationship between running-in quality and the fractal dimensions of friction signal and wear surface is analyzed. It shows that the larger...

... of the fractal dimension can be 77% after 1.42 million running revolutions. Further analysis showed that the three methods all reflected the raceway wear dependence on the number of revolutions, and the linear correlation of the fractal dimension method with the number of revolutions was the strongest, which...

... acquisition system was used to collect and analyze the experimental data of electrical contact resistance (ECR) and friction torque (T f ). Fractal theory was used to deal with the signals of the above two parameters simultaneously. The fractal dimension (D s ) and topothesy (G) of the signals were used...

...Jeng Luen Liou; Jen Fin Lin Instead of a general consideration of the fractal dimension ( D ) and the topothesy ( G * ) as two invariants in the fractal analysis of surface asperities, these two roughness parameters in the present study are varied by changing the mean separation ( d * ) of two...