Multiscale Contact Mechanics with Application to Seals and Rubber Friction on Dry and Lubricated Surfaces

2016 ◽  
pp. 103-156 ◽  
Author(s):  
B. N. J. Persson ◽  
B. Lorenz ◽  
M. Shimizu ◽  
M. Koishi
Keyword(s):  
Contact Mechanics ◽  
Rubber Friction

Rubber Friction and Contact Mechanics of Rubber

2017 ◽  
pp. 283-298
Author(s):  
Valentin L. Popov
Keyword(s):  
Contact Mechanics ◽  
Rubber Friction

scholarly journals On the nature of surface roughness with application to contact mechanics, sealing, rubber friction and adhesion

2004 ◽  
Vol 17 (1) ◽  
pp. R1-R62 ◽  
Author(s):  
B N J Persson ◽  
O Albohr ◽  
U Tartaglino ◽  
A I Volokitin ◽  
E Tosatti
Keyword(s):  
Surface Roughness ◽  
Contact Mechanics ◽  
Rubber Friction

Contact mechanics and rubber friction for randomly rough surfaces with anisotropic statistical properties

2009 ◽  
Vol 29 (3) ◽  
pp. 275-284 ◽  
Author(s):  
G. Carbone ◽  
B. Lorenz ◽  
B. N. J. Persson ◽  
A. Wohlers
Keyword(s):  
Contact Mechanics ◽  
Rough Surfaces ◽  
Statistical Properties ◽  
Rubber Friction ◽  
Randomly Rough Surfaces

scholarly journals General contact mechanics theory for randomly rough surfaces with application to rubber friction

2015 ◽  
Vol 143 (22) ◽  
pp. 224111 ◽  
Author(s):  
M. Scaraggi ◽  
B. N. J. Persson
Keyword(s):  
Contact Mechanics ◽  
Rough Surfaces ◽  
Rubber Friction ◽  
Randomly Rough Surfaces

scholarly journals Asperity-based modification on theory of contact mechanics and rubber friction for self-affine fractal surfaces

Friction ◽  
2021 ◽  
Author(s):  
Anahita Emami ◽  
Seyedmeysam Khaleghian ◽  
Saied Taheri
Keyword(s):  
Contact Mechanics ◽  
Correction Factor ◽  
Contact Area ◽  
Normal Load ◽  
Vertical Displacement ◽  
Dynamics Simulation ◽  
Real Contact Area ◽  
Physical Parameters ◽  
Sliding Velocity ◽  
Rubber Friction

AbstractModeling the real contact area plays a key role in every tribological process, such as friction, adhesion, and wear. Contact between two solids does not necessarily occur everywhere within the apparent contact area. Considering the multiscale nature of roughness, Persson proposed a theory of contact mechanics for a soft and smooth solid in contact with a rigid rough surface. In this theory, he assumed that the vertical displacement on the soft surface could be approximated by the height profile of the substrate surface. Although this assumption gives an accurate pressure distribution at the interface for complete contact, when no gap exists between two surfaces, it results in an overestimation of elastic energy stored in the material for partial contact, which typically occurs in many practical applications. This issue was later addressed by Persson by including a correction factor obtained from the comparison of the theoretical results with molecular dynamics simulation. This paper proposes a different approach to correct the overestimation of vertical displacement in Persson’s contact theory for rough surfaces with self-affine fractal properties. The results are compared with the correction factor proposed by Persson. The main advantage of the proposed method is that it uses physical parameters such as the surface roughness characteristics, material properties, sliding velocity, and normal load to correct the model. This method is also implemented in the theory of rubber friction. The results of the corrected friction model are compared with experiments. The results confirm that the modified model predicts the friction coefficient as a function of sliding velocity more accurately than the original model.

Rubber Friction and Contact Mechanics of Rubber

2010 ◽  
pp. 255-270 ◽  
Author(s):  
Valentin L. Popov
Keyword(s):  
Contact Mechanics ◽  
Rubber Friction

scholarly journals Theory of rubber friction and contact mechanics

2001 ◽  
Vol 115 (8) ◽  
pp. 3840-3861 ◽  
Author(s):  
B. N. J. Persson
Keyword(s):  
Contact Mechanics ◽  
Rubber Friction

The effect of finite roughness size and bulk thickness on the prediction of rubber friction and contact mechanics

2016 ◽  
Vol 230 (9) ◽  
pp. 1398-1409 ◽  
Author(s):  
M Scaraggi ◽  
BNJ Persson
Keyword(s):  
Contact Mechanics ◽  
Contact Area ◽  
Low Frequency ◽  
Numerical Results ◽  
Finite Sample ◽  
Rubber Friction ◽  
Finite Sample Size ◽  
Tread Rubber ◽  
Randomly Rough Surface

We present the numerical results for the viscoelastic and adhesive contribution to rubber friction for a tread rubber sliding on a hard solid with a randomly rough surface. In particular, the effect of the high- and low-frequency roughness power spectrum cut-off is investigated. The numerical results are then compared to the predictions of an analytical theory of rubber friction. We show that the friction coefficient for large load is given exactly by the theory while some difference between theory and simulations occur for small loads, due to a finite sample-size effects, whereas the contact area is almost unaffected by the low frequency cut-off. Finally, the role of a finite rubber thickness on viscoelastic friction and contact area is introduced and critically discussed. Interestingly, we show that classical rough contact mechanics scaling rules do not apply for this case.

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.

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