Theory of powdery rubber wear

Persson, B. N. J.

doi:10.1088/0953-8984/21/48/485001

Cited by 36 publications

(31 citation statements)

References 31 publications

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“…Two parameters contribute to the friction of rubbers, in the form of adhesion and hysteresis friction. While the adhesion component is responsible for the friction of elastomers, the deformation mechanism involves complete dissipation of energy in the contact area . The protuberance of larger abrasives and low mechanical properties (high 1/(se)) lead to the increase of TBU by the increase of the adhesive friction and deformation of the rubber, respectively.…”

Section: Resultssupporting

confidence: 55%

“…While the adhesion component is responsible for the friction of elastomers, the deformation mechanism involves complete dissipation of energy in the contact area. 40,44 The protuberance of larger abrasives and low mechanical properties (high 1/(se)) lead to the increase of TBU by the increase of the adhesive friction and deformation of the rubber, respectively. With the increase of the abrasive size, the real contact area and applied stress on surface of rubber increase that lead to the increase of participation of adhesive friction and deformation in friction, respectively.…”

Section: Temperature Buildup (Tbu)mentioning

confidence: 99%

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Study of effective parameters on wear behavior of rubbers based on statistical methods

Hakami

Pramanik

Islam

et al. 2019

Polymers for Advanced Techs

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This study investigates the wear, surface roughness, and temperature buildup (TBU) of styrene butadiene rubber (SBR), natural rubber (NR), and nitrile butadiene rubber (NBR) while sliding over abrasives of different sizes with the variation of normal load. Rubber properties such as tensile strength (s) and elongation at break (e) were considered as input parameters. Individual, as well as interacting effects of different parameters, were analyzed in‐depth by using statistical methods. Overall wear of rubber depends not only on the tribological system but also on mechanical properties that contribute different wear mechanisms in addition to abrasion. The abrasive particle size and 1/(se) are the first and second most significant contributing factors, respectively, to all output parameters except the wear rate where the second contributing factor is the applied load and abrasive size is the highest contributor. Larger abrasive particles deepen ploughing marks, which is enhanced by the higher load, and lead to higher surface roughness. The effect of load on TBU is negligible because of the soft nature of the rubber material.

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Section: Resultssupporting

confidence: 55%

Section: Temperature Buildup (Tbu)mentioning

confidence: 99%

Study of effective parameters on wear behavior of rubbers based on statistical methods

Hakami

Pramanik

Islam

et al. 2019

Polymers for Advanced Techs

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show abstract

“…Rubber friction is a topic of huge practical importance, e.g., for tires, rubber seals, wiper blades, conveyor belts and syringes [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Many experiments have been performed with a hard spherical ball rolling on a flat rubber substrate [15,17,18].…”

Section: Introductionmentioning

confidence: 99%

Rolling friction for hard cylinder and sphere on viscoelastic solid

Persson

2010

Eur. Phys. J. E

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We calculate the friction force acting on a hard cylinder or spherical ball rolling on a flat surface of a viscoelastic solid. The rolling-friction coefficient depends non-linearly on the normal load and the rolling velocity. For a cylinder rolling on a viscoelastic solid characterized by a single relaxation time Hunter has obtained an exact result for the rolling friction, and our result is in very good agreement with his result for this limiting case. The theoretical results are also in good agreement with experiments of Greenwood and Tabor. We suggest that measurements of rolling friction over a wide range of rolling velocities and temperatures may constitute a useful way to determine the viscoelastic modulus of rubber-like materials.

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“…This is evident, when comparing the specific wear rates which differ by even two decades of magnitude. This can be explained by the concept of the crack mean-free path, using theory of powdery rubber wear [32]; it has been suggested that reducing the crack mean-free path results in reduction of the wear rate. Unreinforced rubber compound, because of lack of (strong) inhomogeneities which can scatter the crack tip and reduce the crack mean-free path, has a very bad wear resistance.…”

Section: Discussionmentioning

confidence: 99%

Existence of a Tribo-Modified Surface Layer on SBR Elastomers: Balance Between Formation and Wear of the Modified Layer

et al. 2015

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In most of the tribological contacts, the composition and tribological properties of the original interface will change during use. The tribo-films, with modified properties compared to the bulk, are dynamic structures that play a significant role in friction. The existence of a tribo-modified surface layer and its importance on the overall friction of elastomers has been shown both theoretically and experimentally before. The characteristics of the modified surface layer deserve specific attention since the tribological properties of elastomers in contact with a rough counter-surface are determined by these modified surfaces together with the properties of bulk of the material. Both the formation of the modified layer and the break down (wear) of it are of importance in determining the existence and thickness of the tribo-modified layer. In this study, the importance of the wear is emphasized by comparing two styrene butadiene rubber-based elastomers in contact with a granite sphere. A current status of perception of the removal and the stability of the modified surface layers on rubbers is introduced as well as experimental work related to this matter and discussion within literature. Pin-on-disk friction tests are performed on two SBR-based samples in contact with a granite sphere under controlled environmental conditions to form the modified surface layer. Although the hysteresis part of the friction force which has a minor contribution in the overall friction is not markedly different, the total measured friction coefficient differs significantly. Mechanical changes both inside and outside the wear track are determined by atomic force microscope nano-indentations at different timescales to examine the modified surface layer on the test samples. The specific wear rates of the two tribo-systems are compared, and the existence of the modified surface layer, the different measured friction coefficient and the running-in distances toward steady-state friction are explained considering different wear rates. A conceptual model is presented, correlating the energy input into the tribo-system and the existence of a modified surface layer.

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Theory of powdery rubber wear

Cited by 36 publications

References 31 publications

Study of effective parameters on wear behavior of rubbers based on statistical methods

Study of effective parameters on wear behavior of rubbers based on statistical methods

Rolling friction for hard cylinder and sphere on viscoelastic solid

Existence of a Tribo-Modified Surface Layer on SBR Elastomers: Balance Between Formation and Wear of the Modified Layer

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