Study on the Behavior Characteristics of Rubber Friction Bearing Devices

2021 ◽  
Vol 12 (5) ◽  
pp. 37-43
Author(s):  
Jae-Joung Kim ◽  
◽  
Chang-Hyun Paek ◽  
Jong-Wan Hu ◽  
Young-Chan Kim
Keyword(s):  
Rubber Friction ◽  
Friction Bearing ◽  
Behavior Characteristics

scholarly journals EXPEDIENCY OF USING FRICTION-BEARING ASBESTOS-RUBBER MATERIALS IN FRICTION UNITS

2021 ◽  
Vol 4 (4) ◽  
pp. 89-93
Author(s):  
Leonid Kondratev ◽  
Nikolai Jujukin
Keyword(s):  
Wear Resistance ◽  
Friction Material ◽  
Friction Materials ◽  
Maintenance And Repair ◽  
Friction Units ◽  
Rubber Friction ◽  
Friction Bearing ◽  
Low Strength ◽  
The Cost

The article presents an analysis and comparison of friction elements consisting of Ferodo and retinax with asbestos-rubber friction material 143-63 and 8-45-62 in the nodes and brakes of forging and pressing machines operated at the factories of the forest and woodworking industry. In Russia, widely used friction materials Ferodo and retinax in the clutches and brakes of operating machines no longer satisfy consumers in many cases due to their low strength and wear resistance, which began to limit the performance of friction units. The analysis showed that the use of friction asbestos-rubber materials of grades 143-63 and 8-45-62 in the nodes and brakes of forging and pressing machines operated at the factories of the forest and woodworking industry, will dramatically increase both the productivity of machines and their performance, and also makes it possible to significantly reduce the cost of maintenance and repair of forging and pressing equipment.

A Graph Based Security Description Method of Driving Behavior Characteristics

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Hang Qi ◽  
Xiao-Hua Zhao ◽  
Yi-Ping Wu ◽  
Chang Liu
Keyword(s):  
Driving Behavior ◽  
Behavior Characteristics

Rubber–Road Contact: Comparison of Physics-Based Theory and Indoor Experiments

2016 ◽  
Vol 44 (3) ◽  
pp. 150-173 ◽  
Author(s):  
Mehran Motamedi ◽  
Saied Taheri ◽  
Corina Sandu
Keyword(s):  
Rough Surface ◽  
Practical Importance ◽  
Surface Profile ◽  
Surface Characteristics ◽  
Mechanical Analysis ◽  
Friction Model ◽  
Rubber Friction ◽  
Optical Profilometer ◽  
Viscoelastic Modulus ◽  
Longitudinal Slip

ABSTRACT For tire designers, rubber friction is a topic of pronounced practical importance. Thus, development of a rubber–road contact model is of great interest. In this research, to predict the effectiveness of the tread compound in a tire as it interacts with the pavement, the physics-based multiscale rubber-friction theories developed by B. Persson and M. Klüppel were studied. The strengths of each method were identified and incorporated into a consolidated model that is more comprehensive and proficient than any single, existing, physics-based approach. In the present work, the friction coefficient was estimated for a summer tire tread compound sliding on sandpaper. The inputs to the model were the fractal properties of the rough surface and the dynamic viscoelastic modulus of rubber. The sandpaper-surface profile was measured accurately using an optical profilometer. Two-dimensional parameterization was performed using one-dimensional profile measurements. The tire tread compound was characterized via dynamic mechanical analysis. To validate the friction model, a laboratory-based, rubber-friction test that could measure the friction between a rubber sample and any arbitrary rough surface was designed and built. The apparatus consisted of a turntable, which can have the surface characteristics of choice, and a rubber wheel in contact with the turntable. The wheel speed, as well as the turntable speed, could be controlled precisely to generate the arbitrary values of longitudinal slip at which the dynamic coefficient of friction was measured. The correlation between the simulation and the experimental results was investigated.

A Quantitative Theory for the Computation of Tire Friction Under Severe Conditions of Sliding

1986 ◽  
Vol 14 (1) ◽  
pp. 44-72 ◽  
Author(s):  
C. M. Mc C. Ettles
Keyword(s):  
Friction Coefficient ◽  
Flash Temperature ◽  
Contact Conditions ◽  
Quantitative Form ◽  
Heating Effects ◽  
Rubber Friction ◽  
Viscoelastic Effects ◽  
Tire Friction ◽  
Pavement Friction ◽  
Metal Polymer

Abstract It is proposed that tire-pavement friction is controlled by thermal rather than by hysteresis and viscoelastic effects. A numerical model of heating effects in sliding is described in which the friction coefficient emerges as a dependent variable. The overall results of the model can be expressed in a closed form using Blok's flash temperature theory. This allows the factors controlling rubber friction to be recognized directly. The model can be applied in quantitative form to metal-polymer-ice contacts. Several examples of correlation are given. The difficulties of characterizing the contact conditions in tire-pavement friction reduce the model to qualitative form. Each of the governing parameters is examined in detail. The attainment of higher friction by small, discrete particles of aluminum filler is discussed.

scholarly journals Behavior Characteristics of Single Batter Pile under Vertical Load

2021 ◽  
Vol 11 (10) ◽  
pp. 4432
Author(s):  
Jiseong Kim ◽  
Seong-Kyu Yun ◽  
Minsu Kang ◽  
Gichun Kang
Keyword(s):  
Bearing Capacity ◽  
Relative Density ◽  
Model Test ◽  
Ground Surface ◽  
Bending Moment ◽  
Vertical Position ◽  
Vertical Load ◽  
Behavior Characteristics

The purpose of this study is to grasp the behavior characteristics of a single batter pile under vertical load by performing a model test. The changes in the resistance of the pile, the bending moment, etc. by the slope of the pile and the relative density of the ground were analyzed. According to the results of the test, when the relative density of the ground was medium and high, the bearing capacity kept increasing when the angle of the pile moved from a vertical position to 20°, and then decreased gradually after 20°. The bending moment of the pile increased as the relative density of the ground and the batter angle of the pile increased. The position of the maximum bending moment came closer to the ground surface as the batter angle of the pile further increased, and it occurred at a point of 5.2~6.7 times the diameter of the pile from the ground surface.

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