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  • A pin-on-disc study of airborne wear particle emissions from studded tyre on concrete road contacts

    Publication
    • U. Olofsson
    • M. Tu
    • O. Nosko
    • Y. Lyu
    • S. Dizdar

    - WEAR - Year 2018

    Studded tyres wear surfaces of winter roads, generating inhalable airborne particles. In this study, four concrete road materials and two stud geometries were investigated in terms of wear, road material hardness and airborne particle concentration. The sliding contact between studded tyres and road materials was studied using a pin-on-disc machine in a clean chamber. The results show that the normal load and the stud size have...

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  • Friction-Induced Oscillations of a Non-Asbestos Organic Pin Sliding on a Steel Disc

    Publication

    - Acta Mechanica et Automatica - Year 2015

    Friction-induced oscillations result in deterioration of performance of disc brakes and are generally undesired. We conduct experimental study of friction-induced oscillations in a non-asbestos organic material / steel pair used in disc brakes of motor vehicles. The tests are done by use of a pin-on-disc machine which has the pin sample supported on a deformable beam. The adjustable friction parameters are the disc velocity, contact...

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  • Effective density of airborne wear particles from car brake materials

    Publication

    - JOURNAL OF AEROSOL SCIENCE - Year 2017

    People living in urban environments are subject to high health risks due to various anthropogenic sources of airborne particulate matter, including wear of transport vehicle brakes. Studies of airborne particles often require an estimate of the effective particle density, a property that allows correct matching of mass and size characteristics measured by different aerosol instruments. In this study we investigated the effective...

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  • Quantification of ultrafine airborne particulate matter generated by the wear of car brake materials

    Publication

    - WEAR - Year 2017

    The wear of car brakes is one of the main sources of airborne particulate matter in urban environments. Ultrafine wear particles are of special environmental interest since they can easily penetrate the human body through inhalation and cause various diseases. In the present study, the contribution of ultrafine particles to airborne particulate matter emitted from car brake materials was investigated under different friction conditions....

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  • Porosity and shape of airborne wear microparticles generated by sliding contact between a low-metallic friction material and a cast iron

    Publication
    • O. Nosko
    • R. Borrajo-Pelaez
    • P. Hedström
    • U. Olofsson

    - JOURNAL OF AEROSOL SCIENCE - Year 2017

    The wear of brakes in transport vehicles is one of the main anthropogenic sources of airborne particulate matter in urban environments. The present study deals with the characterisation of airborne wear microparticles from a low-metallic friction material / cast iron pair used in car brakes. Particles were generated by a pin-on-disc machine in a sealed chamber at sliding velocity of 1.3 m/s and contact pressure of 1.5 MPa. They...

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