Third bodies, also termed friction layers, tribofilms or secondary contact patches, are layers of more or less compacted wear debris between pads and rotor of a disc brake. Our approach of assessing the sliding behavior and friction properties induced by third bodies has been: i) structural characterization after AK-master test procedure, ii) sliding simulation of model structures similar to the observed ones but with simpler and well defined compositions, and iii) verification of simulation results by pin-on-disc tests with artificial third bodies showing the same microstructures and compositions as the model structures. The idea was to simulate structure formation during real braking conditions by high energy ball milling of appropriate powder blends. The final outcome of numerous parameter studies was that a third body containing 15 vol% soft ingredients and 0-20 vol % hard ingredients, both distributed homogeneously in a nanocrystalline iron oxide matrix, should be most desirable for braking. This general description of the optimum third body structure and several parameter studies performed by modelling enabled us to interpret a number of features of the AK-master test procedure, such as i) friction evolution during bedding, ii) the role of solid lubricants in respect to the initiation of smooth sliding behavior, and iii) friction evolution during a single braking event (in-stop behavior).


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Some Considerations on the Role of Third Bodies during Automotive Braking


    Weitere Titelangaben:

    Sae International Journal of Passenger Cars. Mechanical Systems
    Sae Int. J. Passeng. Cars - Mech. Syst


    Beteiligte:

    Kongress:

    SAE Brake Colloquium & Exhibition - 32nd Annual ; 2014



    Erscheinungsdatum :

    2014-09-28


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    MANAGEMENT OF THE CLEANING OF FRICTION BODIES OF AUTOMOTIVE BRAKING SYSTEMS

    BONACCORSO GABRIELE / ENRICO LUCA / BADINO RENATO et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Management of the cleaning of friction bodies of automotive braking systems

    BONACCORSO GABRIELE / ENRICO LUCA / BADINO RENATO et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    MANAGEMENT OF THE CLEANING OF FRICTION BODIES OF AUTOMOTIVE BRAKING SYSTEMS

    BONACCORSO GABRIELE / ENRICO LUCA / BADINO RENATO et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    MANAGEMENT OF THE CLEANING OF FRICTION BODIES OF AUTOMOTIVE BRAKING SYSTEMS

    BONACCORSO GABRIELE / ENRICO LUCA / BADINO RENATO et al. | Europäisches Patentamt | 2021

    Freier Zugriff