Tire Tread Temperatures in Actual Contact Areas

1994 ◽  
Vol 22 (1) ◽  
pp. 19-41 ◽  
Author(s):  
T. Fujikawa ◽  
A. Funazaki ◽  
S. Yamazaki
Keyword(s):  
Thermal Diffusivity ◽  
Heat Source ◽  
Temperature Measurement ◽  
Contact Area ◽  
Moving Heat Source ◽  
Slip Direction ◽  
Actual Contact ◽  
Actual Contact Area ◽  
Contact Areas

Abstract This report treats the temperature in an actual contact area between the pavement and the tread of a cornering tire. A method to compute the temperature by using Jaeger's formula for a moving heat source is proposed. Additionally, a temperature measurement was conducted. The computed value is consistent with the measured value. The computed results for various pavement parameters show that the actual contact area size and pavement thermal diffusivity significantly affect the temperature, and that the distribution of tire tread temperature around the actual contact area varies considerably along the slip direction of the tread.

Determining the Actual Contact Area in Mutual Lapping of Surfaces

2021 ◽  
Vol 41 (5) ◽  
pp. 437-438
Author(s):  
K. R. Muratov ◽  
E. A. Gashev ◽  
T. R. Ablyaz ◽  
P. V. Maksimov ◽  
M. S. Permyakov ◽  
...  
Keyword(s):  
Contact Area ◽  
Actual Contact ◽  
Actual Contact Area

scholarly journals EFFECT OF RATIO OF MATERIAL HARDNESSES, AVERAGE PRESSURE AND ROUGHNESS PARAMETERS ON ACTUAL CONTACT AREA OF ASSEMBLED SURFACES

2021 ◽  
pp. 32-36
Author(s):  
M. M. Matlin ◽  
V. A. Kazankin ◽  
E. N. Kazankina ◽  
E. V. Kapinosova
Keyword(s):  
Contact Area ◽  
Rough Surfaces ◽  
Average Pressure ◽  
Roughness Parameters ◽  
Actual Contact ◽  
Actual Contact Area ◽  
Elastic Plastic

The paper describes the influence of various factors, including the ratio of hardness, average pressure, radius of microasperities of the surface, affecting the value of the actual contact area of rough surfaces of flat parts mated in fixed joints. The study was carried out using the dependences obtained by the authors describing the elastic-plastic contact of rough surfaces.

scholarly journals A Shear Strength Model for a Subsidence Backfill Body Based on Adhesion Friction Theory

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Lei Liu ◽  
Shengyou Zhang ◽  
Weidong Liu ◽  
Wei Sun ◽  
Jinxin Li
Keyword(s):  
Shear Strength ◽  
Contact Area ◽  
Adhesive Contact ◽  
Calculation Model ◽  
Strength Calculation ◽  
Strength Analysis ◽  
Actual Contact ◽  
Actual Contact Area ◽  
Friction Theory

Proper determination of the shear strength of the backfill body used to fill the subsidence is the basis for subsidence restoration and the stability analysis of materials. This study developed a shear strength calculation model for the backfill body by introducing adhesive friction theory into the shear strength analysis. A direct shear test was performed in the laboratory to verify the proposed method. Test results suggested that the shear strength calculation method based on adhesive friction theory can calculate the variation in the actual contact area between grains in the tested samples undergoing shearing and estimate the peak shear strength. The actual contact area was divided into two components, namely, adhesive contact area Arm and contact area reduction caused by shear displacement, which exhibited a maximum at Armax. The shear strength values calculated by this method were smaller than laboratory values, and their differences increased with the rock proportion in the backfill body. The differences between the theoretical and experimental values of shear strength increased with the rock grain size. The results of theoretical calculation, combined with the results of laboratory experiments, can provide support for the proper determination of shear strength of the backfill body.

scholarly journals Investigation of the Cause-Effect Relationships between the Exothermic Reaction and the Microstructures of Reactive Ni-Al Particles Produced by High Energy Planetary Ball Milling

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 876
Author(s):  
Christian Bernauer ◽  
Sandra Grohmann ◽  
Philipp Angermann ◽  
Daniel Dickes ◽  
Florian Holzberger ◽  
...  
Keyword(s):  
Heat Source ◽  
Ball Milling ◽  
Contact Area ◽  
Exothermic Reaction ◽  
High Energy ◽  
Heat Of Reaction ◽  
Contact Areas ◽  
Milling Parameters ◽  
Planetary Ball Milling ◽  
Reactive Particles

Reactive particles consisting of nickel and aluminum represent an adaptable heat source for joining applications, since each individual particle is capable of undergoing a self-sustaining exothermic reaction. Of particular interest are particles with intrinsic lamellar microstructures, as they provide large contact areas between the reactants nickel and aluminum. In this work, the exothermic reaction as well as the microstructure of such lamellar reactive particles produced by high energy planetary ball milling were investigated. Based on statistically designed experiments regarding the milling parameters, the heat of reaction was examined by means of differential scanning calorimetry (DSC). A statistical model was derived from the results to predict the heat of reaction as a function of the milling parameters used. This model can be applied to adjust the heat of reaction of the reactive particles depending on the thermal properties of the joining partners. The fabricated microstructures were evaluated by means of scanning electron microscopy (SEM). Through the development of a dedicated SEM image evaluation algorithm, a computational quantification of the contact area between nickel and aluminum was enabled for the first time. A weak correlation between the contact area and the heat of reaction could be demonstrated. It is assumed that the quantification of the contact areas can be further improved by a higher number of SEM images per sample. The findings obtained provide an essential contribution to enable reactive particles as a tailored heat source for joining applications.

The actual contact area and friction properties of elastomers under frictional contact with solid surfaces

Wear ◽  
1971 ◽  
Vol 18 (6) ◽  
pp. 439-448 ◽  
Author(s):  
G.M. Bartenev ◽  
V.V. Lavrentjev ◽  
N.A. Konstantinova
Keyword(s):  
Contact Area ◽  
Frictional Contact ◽  
Solid Surfaces ◽  
Actual Contact ◽  
Actual Contact Area

Actual Contact Area in Pressure Couplings between Components of Different Hardness

2018 ◽  
Vol 38 (11) ◽  
pp. 830-833
Author(s):  
M. M. Matlin ◽  
V. A. Kazankin ◽  
E. N. Kazankina ◽  
A. I. Mozgunova
Keyword(s):  
Contact Area ◽  
Actual Contact ◽  
Actual Contact Area
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