Friction and wear of polymers

Бартенев, Г. М.; Lavrent'ev, V. V.; Tabor, D.

doi:10.1016/0301-679x(82)90067-6

Cited by 81 publications

(86 citation statements)

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“…The mutual influence of asperities has a significant effect on the contact characteristics. The relative contact area η1 at fq, which is confirmed by the empirical dependence of BartenevLavrentiev [5]. The parameters of the surface bearing curve do not affect the relative contact area and have little effect on the density of gaps in the joint.…”

Section: Discussionsupporting

confidence: 60%

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Characteristics of Contact of a Rough Surface With A Low-Modulus Half-Space

Ogar

Belokobylsky

Gorokhov

et al. 2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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Initially, the contact of a single spherical asperity is considered with taking into account the influence of the remaining contacting asperities. It is assumed that the influence of the remaining contacting asperities is equal to the action of the uniform loading qc outside the asperity contour. This made possible to solve the contact problem as an axisymmetric one. An equation for the pressure distribution at the contact area is obtained. To determine the contact characteristics, a discrete roughness model is used, the surface bearing curve of which is described by a regularized beta function. The relative contact area and the gap density in the joint are determined depending on the dimensionless force elastic-geometric parameter fq. When determining the gap density in the joint, the displacements of the rough surface and half-space are taken into account. It is shown that the contact characteristics do not depend on the values of the regularized beta function parameters p and q.

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Section: Discussionsupporting

confidence: 60%

“…The required tightness of the sealing joint is achieved by compressive stresses and depends on the contact characteristics -the relative contact area and the gap density [4]. Experimental studies [5] showed a slowdown in the growth of the relative contact area with the increase in load due to the mutual influence of asperities.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Contact of a Rough Surface With A Low-Modulus Half-Space

Ogar

Belokobylsky

Gorokhov

et al. 2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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“…The latter relationship is responsible for less intensive external friction. The role of viscoelastic properties in the friction of rubbers is well known and adequately covered in the literature [40,41]. Laminar and supercritical conditions of straining in the case of PB with a wide MWD will be considered next.…”

Section: Behavior Of Pb In Capillaries Under Supercritical Conditionsmentioning

confidence: 99%

The rheological behavior of flexible-chain polymers in the region of high shear rates and stresses, the critical process of spurting, and supercritical conditions of their movement at T > Tg

1984

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Methods of capillary viscometry were used in studying the rheological properties and behavior of a broad range of rubbers, including polymers with narrow and wide molecular-weight-distribution as well as commercial rubber grades, at widely varying shear rates and stresses. As is shown, in full conformity with the previously conducted experiments, during transition from a fluid to highelastic (quasi-cross-linked) state, they are chracterized by spurting followed by sliding over the channel walls. This relaxation transition is characterized by a critical shear stress value invariant with respect to the molecular weight, molecularweight distribution and temperature. The parameters defining spurting of polymer flow as a function of molecular-weight characteristics, temperature, and channel geometry have been investigated in detail. It is shown for the first time that under supercritical conditions the rate of polymer flow through channels does not depend, in the first approximation, on the molecular weight of the polymer, its molecularweight distribution, temperature, and filling, but is determined only by the shear stress.

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“…Schallmach 와 Grosch 는 이러한 복잡한 마모·마찰 메커니즘을 밝히는데 크게 기여하였으며 [3][4][5][6][7][8] , Gent 등은 인열에너지 이론 을 기초로 칼날형 마모시험기를 제작하여 마모 현상을 연구하 였다.…”

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Wear Behavior of C/B filled NR Compounds using a Blade-type Abrader

Youn¹,

Kaang²

2014

Elastomers and Composites

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ABSTRACT：Friction and wear behaviors of natural rubber(NR) compounds were investigated using a blade-type abrader. The effects of temperature, normal load, and rotation speed on wear rate were studied, and wear behaviors of deteriorated compounds were also evaluated. As the rotation speed of specimen and the normal load to specimen increased, the wear rate increased. However, as the experimental temperature increased, the frictional coefficient decreased and the wear rate decreased accordingly. It was found from the wear studies that a power-law relation works between the frictional work input and the wear rate. It was observed that the wear rate dramatically increased by the degradation of the rubber specimen. The wear pattern was developed and the bigger ridge space of the pattern was observed usually in the higher normal load applied. In determining the wear rate of rubber compound, the continuous measurements of wear distance using the blade-type abrader could be successfully used instead of intermittent measurements of wear-loss weight. , Gent 등은 인열에너지 이론 을 기초로 칼날형 마모시험기를 제작하여 마모 현상을 연구하 였다.9-11 본 연구에서는 자체 설계 제작한 칼날형 마모시험기 를 이용하여 carbon black 이 충전된 NR 배합고무의 마모·마찰 특성을 평가하였다. 12,13

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Friction and wear of polymers

Cited by 81 publications

References 0 publications

Characteristics of Contact of a Rough Surface With A Low-Modulus Half-Space

Characteristics of Contact of a Rough Surface With A Low-Modulus Half-Space

The rheological behavior of flexible-chain polymers in the region of high shear rates and stresses, the critical process of spurting, and supercritical conditions of their movement at T > Tg

Wear Behavior of C/B filled NR Compounds using a Blade-type Abrader

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