Acoustic output from stick-slip friction

Symmons, G.R.; McNulty, G.J.

doi:10.1016/0043-1648(86)90057-8

Cited by 16 publications

(5 citation statements)

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“…In all cases, the friction coefficient value grows with decreasing sliding speed. This behaviour is widely observed in braking material (anti-fade) [16]. The friction coefficient values indicating the influence of mean normal pressure are presented in figure Fig.5 for constant temperature.…”

Section: Friction Behaviour 311 Mean Normal Pressure and Sliding Spsupporting

confidence: 53%

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Méresse¹,

Watremez

Siroux

et al. 2013

Journal of Tribology

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This work takes place in the understanding of the friction and wear mechanisms occurring in reinforced phenolic materials, widely used in organic braking pads. As the matrix is filled with a large variety of particles, the phenomena in the contact zone are complex and multiphysic. In a first approach the reinforcement is restricted to spherical steel particles with diameters in the range of the fibbers size. The influence of the sliding speed, the mean normal pressure and the contact temperature are examined and the benefits of using this kind of particle is as well discussed. The tribological tests are performed on a newly developed High Speed Tribometer designed to reproduce braking conditions. The results show that temperature is the most influential parameter, leading to a decrease of the friction coefficient. They further indicate that reinforcement pushes the loss of efficiency to a higher temperature. Optical observations and profilometer analysis show that the wear mechanisms are clearly dependent on friction conditions. These results improve our knowledge of wear debris formation and conditions leading to particle debonding in phenolic matrix material.

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Section: Friction Behaviour 311 Mean Normal Pressure and Sliding Spsupporting

confidence: 53%

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Méresse¹,

Watremez

Siroux

et al. 2013

Journal of Tribology

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“…Another characteristic is the noise produced during the friction test, which is for example very sound for the martensitic microstructures and quiet in the case of perlitic microstructures (absence of oxidation). Such behaviour is directly related to a stick slip phenomenon, 16 which confirms the establishment of adhesive wear mechanism. For the two evoked microstructures, there is absence of noise in the first cycles of the test, which is explained by the absence of surface damage (wear).…”

Section: Discussionmentioning

confidence: 57%

Tribological behaviour of carbon and low alloy steels: effect of mechanical properties and test conditions

Autay

Kchaou

Elleuch

et al. 2011

Tribology - Materials, Surfaces & Interfaces

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In this paper, the effects of mechanical properties and test conditions on the tribological behaviour of ISO C45 carbon steel and ISO 42CrMo4 low alloy steel were studied. The tribological tests were carried out, without lubrication, on a reciprocating friction tester. Cylinder on flat contact configuration was adopted. The results showed that there is no obvious relationship between the mechanical properties and the friction ones. However, the variation in the coefficient of friction depends on the test conditions. In contrary to normal load, the effect of sliding speed on the coefficient of friction is not the same for the two steel nuances. The tribological properties are dependent, however, on the nature of wear debris.

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“…Such increase can often be attributed to the adhesion of metal chips in the brake lining to the friction surface of the cast iron disc. In Figure 2, it can be seen that for the SM-10 sample (10 per cent silica at 15,000 kPa pressure), friction coefficient gradually increased up to the average value of 0.38 in 100°C temperature, and then it slowly decreased in 150°C and then it remained stable among 150-300°C temperature which is known as the typical friction manner in the literature (Symmon and McNulty, 1986). Such increase can often be attributed to the adhesion of metal chips in the brake lining to the friction surface of the cast iron disc.…”

Section: Resultsmentioning

confidence: 83%

“…For SM-5 sample, friction coefficient increased to about 0.32 value at 150°C, and then it sharply increased to about 0.36 value at 200°C and then it decreased to about 0.30 value at 350°C temperature. The friction coefficient normally changes with sliding temperature, as adhesion and deformation resistance of the materials change as a function of temperature (Symmon and McNulty, 1986).…”

Section: Resultsmentioning

confidence: 99%

Friction and wear properties of friction materials containing nano/micro-sized SiO₂ particles

Sugozu

Dağhan

Akdemir

et al. 2016

Industrial Lubrication and Tribology

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Purpose – Among the components used for a car brake lining, the chemical and structural properties of the abrasives, jointly with the morphology and size of the particles influence the friction parameters and stability of the composite. This paper aims to investigate the effect of nano SiO2 particles in brake pads on friction and wear properties. Design/methodology/approach – In this paper, the effects of SiO2 (Silica) particles of varying size on the friction-wear properties of polymeric friction composites are investigated. Four friction composites were prepared containing (5, 10 Wt.%) micro silica (MS) particles and (5, 10 Wt.%) nano silica (NS) particles. The samples were produced by a conventional procedure for a dry formulation following dry-mixing, pre-forming and hot pressing. Friction and wear characteristics of the specimens against to a disk made of cast iron were studied. Friction coefficient, specific wear rate and hardness of specimens were obtained. Detailed examinations on the worn surface were analyzed using a scanning electron microscope. Findings – The results of test showed that the inclusion of nano silicon carbide (SiC) powder improved the wear performance significantly. Friction coefficient (μ) of NS samples was higher than the MS samples. Micro-SiC showed poor performance and μ. High wear performance was exhibited in materials containing 5 Wt.% NS and 10 Wt.% NS. Originality/value – This paper emphasizes the importance of nano-composites in the automotive industry and helps to industrial firms and academicians working on wear of materials.

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Acoustic output from stick-slip friction

Cited by 16 publications

References 1 publication

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Tribological behaviour of carbon and low alloy steels: effect of mechanical properties and test conditions

Friction and wear properties of friction materials containing nano/micro-sized SiO₂ particles

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Acoustic output from stick-slip friction

Cited by 16 publications

References 1 publication

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Friction and Wear Mechanisms of Phenolic-Based Materials on High Speed Tribometer

Tribological behaviour of carbon and low alloy steels: effect of mechanical properties and test conditions

Friction and wear properties of friction materials containing nano/micro-sized SiO2 particles

Contact Info

Product

Resources

About

Friction and wear properties of friction materials containing nano/micro-sized SiO₂ particles