TY - CONF A1 - Dmitriev, A.I. A1 - Kloß, Heinz A1 - Österle, Werner T1 - Final outcome of a fundamental research project on tribofilms formed during automotive braking, Part 2: Numerical simulation T2 - EuroBrake 2014 (Proceedings) N2 - In part 1 it was shown that tribofilms usually are 100 nm thick and exhibit a multiphase nanocrystalline structure. The objective of our modelling efforts was to obtain a better understanding of the sliding behaviour and associated friction properties and to study the impact of internal and external parameters on these properties. The method of movable cellular automata (MCA) was used. The third bodies were considered as aggregates of linked nanoparticles which may decompose and form a layer of granulär material, the so-called mechanically mixed layer (MML), if certain fracture criteria are fulfilled. The basic model structure which consists of Fe3Ü4 nanoparticles with 13 % graphite inclusions was used. In order to assess the robustness of the model the following parameter studies were performed. The pressure ränge at an asperity contact was varied between 15 and 50 MPa. The mechanical properties of the oxide were varied between brittle and ductile behaviour corresponding to room temperature and high temperature behaviour. The mechanical properties of the soft ingredient were varied + 50 % of the properties of graphite. The influence T2 - EuroBrake 2014 CY - Lille, France DA - 13.05.2014 KW - Tribofilm KW - Third body KW - Dry friction KW - Modelling KW - Movable cellular automata PY - 2014 SN - 978-0-9572076-4-6 SP - 1 EP - 9 PB - FISITA CY - London AN - OPUS4-35040 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Österle, Werner A1 - Dmitriev, A.I. ED - Bartz, Wilfried J. T1 - Modelling mechanical friction and wear behaviour using numerical results of the movable cellular automata (MCA) method T2 - 19th International colloquium tribology - Industrial and automotive lubrication N2 - In the mechanical friction and wear process, normal and tangential (shear) forces cause elastic and plastic deformations, generate cracks and form loose wear particles through fracture processes. Depending on the working conditions, the material properties and the real contact Situation (topography), a third body is formed as a mechanical ly mixed layer, which determines different running-in and steady-state behaviours. Two dimensional (2D) MCA Simulation results will be described via empirical equations, which are related to the incubation time (period without wear) and the following running-in wear rate (kinetic concept of strength, fatigue wear model). In order to understand the running-in and steady-state wear, kinetic model equations for mass balance of the third body are useful and are therefore to be included in the investigation. For a more complex material behaviour, numerical Simulation results are also presented for friction at the pad-disk interface of automotive brakes. T2 - 19th International colloquium Tribology - Industrial and automotive lubrication CY - Stuttgart/Ostfildern, Germany DA - 21.01.2014 PY - 2014 SN - 978-3-943563-10-8 SP - Paper 8.10, 1 EP - 7 CY - Stuttgart/Ostfildern AN - OPUS4-30437 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Österle, Werner A1 - Dmitriev, Andrey A1 - Kloß, Heinz T1 - Assessment of sliding friction of a nanostructured solid lubricant film by numerical simulation with the method of movable cellular automata (MCA) T2 - WTC 2013 - 5th World tribology congress N2 - Tribofilms formed during dry sliding usually exhibit a nanocrystalline structure and complicated composition. In the present study, tribofilms consisting mainly of a solid lubricant, namely graphite nanoparticles, are considered. Systems providing such tribofilms are candidates for anti-friction applications. Since sliding action always leads to mixing of the materials at both sides of the tribological interface, it was of major interest to study the impact of different amounts of a hard constituent, SiC in the considered case, within the soft matrix systematically. Furthermore, the impact of normal pressure was considered. A mechanically mixed layer was observed for the whole range of normal pressures and SiC volume fractions. The calculated coefficient of friction decreased significantly with increasing thickness of this layer but was only marginally affected by SiC volume fraction, which is good news for anti-friction applications. T2 - WTC 2013 - 5th World tribology congress CY - Torino, Italy DA - 08.09.2013 KW - Friction KW - Third body film KW - Numerical simulation KW - Nanostructure PY - 2013 SP - 1 EP - 4 AN - OPUS4-29659 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Österle, Werner T1 - Charakterisierung des mechanischen Reibungs- und Verschleißverhaltens von Werkstoffen mittels Simulationsrechnungen (Methode der beweglichen zellularen Automaten) und analytischer Modelle T2 - 53. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß T2 - 53. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß CY - Göttingen, Germany DA - 2012-09-24 PY - 2012 SN - 978-3-00-039201-6 VL - II SP - 4/1 EP - 4/11 CY - Aachen AN - OPUS4-26733 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Marwitz, Christian A1 - Kloß, Heinz T1 - Bestimmung von Adhäsionskräften mit dem Rasterkraftmikroskop T2 - 51. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendungen T2 - 51. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendungen CY - Göttingen, Deutschland DA - 2010-09-27 KW - Adhäsion KW - Deformation KW - AFM KW - Rauheit PY - 2010 SN - 978-3-00-032180-1 VL - II SP - 53/1 EP - 53/13 CY - Aachen AN - OPUS4-23946 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dmitriev, A.I. A1 - Österle, Werner A1 - Kloß, Heinz T1 - Nano-scale modeling of pad-disc interface. The influence of copper as a pad ingredient. T2 - JEF 2010 - 6th European conference on braking (Proceedings) T2 - JEF 2010 - 6th European conference on braking CY - Lille, France DA - 2010-11-24 KW - Friction layer KW - Copper particles KW - MCA-modelling PY - 2010 SP - 1 EP - 6(?) AN - OPUS4-22656 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Österle, Werner A1 - Dmitriev, A.I. A1 - Kloß, Heinz ED - Jayashree Bijwe, T1 - Basic considerations for the development of friction materials T2 - Proceedings of the IWAAFC-2, International Workshop on Advances in Asbestos-free Friction Composites T2 - IWAAFC-2, International Workshop on Advances in Asbestos-free Friction Composites CY - Delhi, India DA - 2008-02-07 PY - 2008 SP - 24 EP - 51 PB - Indian Academy of Sciences CY - Delhi, India AN - OPUS4-18701 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Österle, Werner A1 - Dmitriev, Andrey T1 - Verschleißverhalten unter Berücksichtigung kinetischer Modellbetrachtungen und Simulationsrechnungen mit der Methode der beweglichen zellularen Automaten (bzA) T2 - 47. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendungen T2 - 47. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendungen CY - Göttingen, Germany DA - 2006-09-25 PY - 2006 SN - 3-00-019670-6 VL - 1 SP - 5/1 EP - 5/10 CY - Aachen AN - OPUS4-15859 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Wäsche, Rolf T1 - Analytical approach for wear prediction of metallic and ceramic materials in tribological applications T2 - Proceedings of ECOTRIB 2007 T2 - ECOTRIB 2007 CY - Ljubljana, Slovenia DA - 2007-06-12 KW - Wear KW - Surface temperature KW - Activation energy KW - Simulation KW - Movable cellular automata (MCA) PY - 2007 VL - I SP - 223 EP - 234 PB - Slovenská Akadémia Vied CY - Ljubljana AN - OPUS4-14972 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Skopp, André A1 - Woydt, Mathias ED - Bartz, Wilfried J. T1 - Wear prediction in ultra-high speed and high temperature applications T2 - Tribology 2000 - plus PY - 2000 SN - 3-924813-44-2 VL - 3 SP - 1639 EP - 1646 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2427 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -