TY - CONF A1 - Kloß, Heinz T1 - 2D and 3D modelling of indentation and scratching test on the base of Movable Cellular Automata (MCA) method T2 - International Conference on New Challenges in Mesomechanics 2002 CY - Aalborg, Denmark DA - 2002-08-26 PY - 2002 AN - OPUS4-3250 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - 2D und 3D Simulationsrechnungen mit der Methode der beweglichen zellularen Automaten (bzA) zur Bewertung des Reibungs- und Verschleißverhaltens von Werkstoffen T2 - GfT Tribologie-Fachtagung 2002 "Reibung, Schmierung und Verschleiß" - Forschung und praktische Anwendungen CY - Göttingen, Germany DA - 2002-09-23 PY - 2002 AN - OPUS4-3251 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Mechanische und tribologischen Eigenschaften von PTFE/PEEK/CF-Verbundwerkstoffen T2 - 2d and 3d modelling of indentation and scratching test on the base of movable cellular automata method CY - Moscow, Russia DA - 2003-06-23 PY - 2003 AN - OPUS4-4290 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Computer aided study of compression and indentation of high-porous materials with ceramic coating T2 - XXXI. International Summer School - Conference: "Advanced Problems in Mechanics" CY - Saint Petersburg, Russia DA - 2003-06-22 PY - 2003 AN - OPUS4-4291 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Simulation of material behavior in tribological contacts on the base of Movable Cellular Automata method (MCA) T2 - VII. Internnational Conference Computer-Aided Design of Advanced Materials and Technologies (CADAMT' 2003) CY - Tomsk, Russia DA - 2003-08-20 PY - 2003 AN - OPUS4-4292 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kloß, Heinz A1 - Santner, Erich A1 - Dmitriev, A.I. A1 - Shilko, E.V. A1 - Psakhie, S.G. A1 - Popov, V.L. T1 - Simulation of material behavior in tribological contacts on the basis of movable cellular automation method PY - 2003 UR - http://www.sciencedirect.com/science/journal/10299599 SN - 1029-9599 VL - 6 IS - 5-6 SP - 57 EP - 62 PB - Inst. of Strength Physics and Materials Science SB RAS CY - Tomsk AN - OPUS4-3708 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Meine, Kerstin A1 - Kloß, Heinz A1 - Schneider, Thomas A1 - Spaltmann, Dirk T1 - Adhäsion an strukturierten Oberflächen N2 - Das tribologische Verhalten wird neben den chemischen und physikalischen Eigenschaften der Reibpartner auch von deren Oberflaechentopographie bestimmt. Um deren Beitrag auf die Reibkraft zu untersuchen, wurden daher definierte Rauheitsstrukturen in Siliziumwafer geaetzt. Reibversuche mit einem Mikrotribometer [1, 2] gaben Aufschluss ueber den Einfluss dieser Strukturen auf das Deformationsverhalten im Kontaktbereich. Mit Hilfe der gewonnenen Daten wurde ein Deformationsmodell entwickelt, das eine Abschaetzung der Reibkraft in Abhaengigkeit von der Rauheit erlaubte. Treten starke Adhaesionskraefte im Reibkontakt auf, ist ein inverter Einfluss der Rauheit auf die Reibkraft zu verzeichnen. Um diesen Verlauf weiter zu charakterisieren, wurden mit einem UHV-AFM Adhaesionsmessungen an strukturierten Siliziumwafern durchgefuehrt. Diese zeigen den Verlauf der Adhaesionskraft in Abhaengigkeit von der Groesse der Kontaktflaeche auf. Ein Vergleich dieser experimentell gefundenen Korrelation mit den klassischen Kontaktmodellen machte dabei den Einfluss der Oberflaechenrauheit auf die Groesse der Adhaesionskraft deutlich. Danach ergab sich, dass bei gleicher Kontaktflaeche, aber unterschiedlicher Rauheit sich die Adhaesionskraefte um bis zu einem Faktor 3 unterscheiden. [1] K. Meine, T. Schneider, D. Spaltmann, E. Santner, Wear, 253, 2002, 725-732 [2] K. Meine, T. Schneider, D. Spaltmann, E. Santner, Wear, 253, 2002, 733-738 T2 - Frühjahrstagung des Arbeitskreises Festkörperphysik bei der DPG CY - Dresden, Deutschland DA - 2003-03-24 PY - 2003 UR - http://old.dpg-tagungen.de/archive/2003/o_6.html SN - 0420-0195 SN - 0372-5448 SN - 0343-9216 IS - O 6.2 SP - 382 CY - Bad Honnef AN - OPUS4-2400 LA - deu 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 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 - TY - GEN A1 - Kloß, Heinz A1 - Santner, Erich A1 - Dmitriev, Andrey A1 - Psakhie, Serguei A1 - Shilko, E. T1 - Simulationsrechnungen mit der Methode der beweglichen zellularen Automaten (bzA) für eine Verschleißprognose metallischer Werkstoffe T2 - Tribologie-Fachtagung 2004 CY - Göttingen, Deutschland DA - 2004-09-27 PY - 2004 SN - 3-00-015053-6 PB - Ges. für Tribologie CY - Moers AN - OPUS4-5127 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kloß, Heinz A1 - Klaffke, Dieter T1 - Untersuchungen und Modellrechnungen für eine Verschleißprognose metallischer Werkstoffe T2 - 46. Tribologie-Fachtagung "Reibung, Schmierung und Verschleiß CY - Göttingen, Deutschland DA - 2005-09-26 PY - 2005 SN - 3-00-017102-9 VL - I SP - 8/1 EP - 8/9 PB - GfT CY - Moers AN - OPUS4-11081 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Computer-Aided Simulation of Material Local Fracture Effects at the Area of Tribological Contacts on the Base of Methods of Discrete Aproach T2 - 11th International Conference on Fracture CY - Turin, Italy DA - 2005-03-20 PY - 2005 AN - OPUS4-11030 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Untersuchungen und Modellrechnungen für eine Verschleißprognose metallischer Werkstoffe T2 - Tribologie-Fachtagung 2005 CY - Göttingen, Germany DA - 2005-09-26 PY - 2005 AN - OPUS4-10959 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Analytischer Ansatz für die Beschreibung experimenteller Verschleißergebnisse T2 - Tribologie-Fachtagung 2006 CY - Göttingen, Germany DA - 2006-09-25 PY - 2006 AN - OPUS4-13633 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kloß, Heinz A1 - Klaffke, Dieter T1 - Untersuchungen und Modellrechnungen für eine Verschleißprognose metallischer Werkstoffe KW - Metalle KW - Verschleißprognose KW - Kontaktmechanik KW - Oberflächentopographie KW - Scherenergiedichte PY - 2006 SN - 0724-3472 VL - 53 IS - 6 SP - 14 EP - 17 PB - Expert Verlag CY - Renningen AN - OPUS4-14798 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 - 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 - JOUR A1 - Dmitriev, A.I. A1 - Österle, Werner A1 - Kloß, Heinz T1 - Numerical simulation of typical contact situations of brake friction materials N2 - In the paper, a model typical for contact situations of automotive brakes is established based on the method of movable cellular automata. The processes taking place at local contacts in an automotive brake system are analysed. Based on microscopic and micro-analytical observations, the following contact situations were simulated: (i) a couple of ferritic steel against pearlitic steel, both covered by an oxide layer mixed with graphite nanoparticles and (ii) the same situation but without oxide layers. The results of calculated mean coefficients of friction of the oxide-on-oxide contact correspond well to expected values for a real braking system, whereas steel-on-steel contact are twice as high. This allows one to make some conclusions; for example, oxide formation will take place more quickly than friction layer elimination, and finally this is responsible for the stabilisation of the coefficient of friction. KW - Friction KW - Primary contact KW - Automotive brake system KW - Numerical simulation KW - Method of movable cellular automata PY - 2008 DO - https://doi.org/10.1016/j.triboint.2007.04.001 SN - 0301-679X VL - 41 IS - 1 SP - 1 EP - 8 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-15841 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 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 - JOUR A1 - Österle, Werner A1 - Kloß, Heinz A1 - Urban, Ingrid A1 - Dmitriev, A.I. T1 - Towards a better understanding of brake friction materials N2 - This work focuses on surface changes induced by repeated brake applications and tries to provide explanations, how such material modifications might affect friction and wear properties of automotive disc brakes. Surface films were investigated locally by transmission electron microscopy (TEM) after having prepared thin cross-sections with a focused ion beam instrument (FIB). Since the observed friction layers revealed a nanocrystalline structure, modelling with the method of movable cellular automata (MCA) was performed by assuming an array of linked nanometer-sized particles. In spite of complicated material combinations at the pad surface, two very characteristic features were always observed at both the pad and disc surface, namely a steel constituent—either ferritic (pad) or pearlitic (disc), partly covered with patches of nanocrystalline iron oxide, on a zone of severe plastic deformation with fragmented grain structure. When using an automata size of 10 nm, reasonable values for the mean coefficient of friction (COF) were obtained, namely 0.35 and 0.85 for oxide-on-oxide and metal-on-metal contacts, respectively. Immediately after brake application mass-mixing and bond-breaking was observed within a narrow zone at both surfaces. KW - Brake pad KW - Brake disc KW - Composite material KW - Friction layer KW - Third body KW - MCA-modelling PY - 2007 DO - https://doi.org/10.1016/j.wear.2006.12.020 SN - 0043-1648 VL - 263 IS - 7-12 SP - 1189 EP - 1201 PB - Elsevier CY - Amsterdam AN - OPUS4-15735 LA - eng 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 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 - Kloß, Heinz T1 - Characterization of the mechanical wear behaviour by using simulation results of Movable Cellular Automata (MCA) method T2 - Int. Conf. on Physical Mesomechanics and Computer-Aided Design and Development of Advanced Materials CY - Tomsk, Russia DA - 2011-09-05 PY - 2011 AN - OPUS4-24287 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz T1 - Charakterisierung des mechanischen Reibungs- und Verschleißverhaltens von Werkstoffen mittels Simulationsrechnungen (Methode der beweglichen zellularen Automaten) und analytischer Modelle T2 - Tribologie-Fachtagung 2012 CY - Göttingen, Germany DA - 2012-09-24 PY - 2012 AN - OPUS4-26575 LA - deu 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) 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 - GEN A1 - Kloß, Heinz A1 - Woydt, Mathias ED - Bartz, Wilfried J. T1 - Predicition of the Tribological Performance of Sliding Systems T2 - 13th International Colloquium Tribology CY - Ostfildern, Germany DA - 2002-01-15 PY - 2002 SN - 3-924813-48-5 VL - 2 SP - 839 EP - 845 PB - Technische Akademie Esslingen CY - Ostfildern AN - OPUS4-1290 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kloß, Heinz A1 - Santner, Erich A1 - Dimitriev, A. A1 - Shilko, E. A1 - Psakhie, S A1 - Popov, V. T1 - 2D und 3D Simulationsrechnungen mit der Methode der beweglichen zellularen Automaten (bzA) zur Bewertung des Reibungs- und Verschleißverhaltens von Werkstoffen T2 - Tribologie-Fachtagung 2002 CY - Göttingen, Deutschland DA - 2002-09-23 PY - 2002 SN - 3-00-003404-8 VL - 1 SP - 32-1-32-9 PB - GfT CY - Moers AN - OPUS4-1527 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kloß, Heinz A1 - Santner, Erich A1 - Dimitriev, A. A1 - Shilko, E. A1 - Psakhie, S A1 - Popov, V. ED - Pyrz, R. T1 - 2D and 3D modelling of indentation and scratching test on the base of Movable Cellular Automata (MCA) method T2 - International Conference on New Challenges in Mesomechanics ; Conference Mesomechanics 2002 CY - Aalborg, Denmark DA - 2002-08-26 PY - 2002 SN - 87-89206-59-2 VL - 2 SP - 557 EP - 563 CY - Aalborg AN - OPUS4-1528 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kloß, Heinz A1 - Woydt, Mathias A1 - Willmann, G. T1 - Temperaturberechnung an den Artikulationsflächen beim künstlichen Hüftgelenk KW - Hüftgelenkersatz KW - Aluminiumoxid KW - Zirkondioxid KW - Blitztemperatur KW - Tribologie KW - Oberflächentopographie PY - 2001 SN - 0933-5137 SN - 1521-4052 VL - 32 IS - 2 SP - 30 S. PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-917 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dmitriev, A.I. A1 - Kloß, Heinz T1 - Does ultra-mild wear play any role for dry friction applications, such as automotive braking? N2 - Nanostructured third body films and/or storage of wear debris at the surfaces of the first bodies are deemed as prerequisites of sliding under ultra-mild wear conditions. Since such features have been observed experimentally on brake pads and discs, attempts were undertaken to study their sliding behaviour by modelling on the nanoscopic scale with an approach based on Movable Cellular Automata (MCA). The model rendered the possibility to study the influence of different nanostructures systematically and to assess the impact of different brake pad ingredients on the sliding behaviour, velocity accommodation and friction force stabilization at a sliding contact. Besides providing a review on previously published modelling results, some additional new graphs enabling better visualization of dynamic processes are presented. Although ultra-mild wear conditions were considered to be essential for achieving the desired tribological properties, transitions to mesoscopic and macroscopic wear mechanisms were studied as well. The final conclusion is that ultra-mild wear and corresponding smooth sliding behaviour play an important role during automotive braking, even though temporarily and locally events of severe wear may cause friction instabilities, surface damage and release of coarse wear particles. KW - Dry friction KW - Ultra-mild wear KW - Third body KW - MCA-model KW - Simulation PY - 2012 DO - https://doi.org/10.1039/c2fd00117a SN - 1359-6640 SN - 1364-5498 VL - 156 IS - 0 SP - 159 EP - 171 PB - Soc. CY - Cambridge [u.a.] AN - OPUS4-26822 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dmitriev, A.I. A1 - Kloß, Heinz T1 - Possible impacts of third body nanostructure on friction performance during dry sliding determined by computer simulation based on the method of movable cellular automata N2 - The tribological properties of nanostructured surface films formed during dry sliding, for example during automotive braking, were determined by modelling using the method of movable cellular automata. Starting from a basic model structure, consisting of magnetite with 13% graphite inclusions, the impact of additional soft and hard particles of different size and volume fraction was studied systematically. It was revealed that agglomerates of soft particles decomposed and finally mixed with the oxide in the same way as single nanoparticles. On the other hand, agglomerates of hard particles mixed with the other components without decomposing. Whereas increasing the amount of soft components in the third Body lowered the coefficient of friction, the opposite occurred with the hard particles. The boundary conditions for obtaining smooth sliding conditions with minor fluctuations between friction forces at successive time steps could be defined. In addition to features of the nanostructure, the applied normal pressure impacted modelling results. Within the parameter range of smooth sliding behaviour, increasing pressure induced thicker granular interface layers, which lead to a slight decrease of the coefficient of friction. Changing the amount of soft or hard particles did not change this pressure dependency but only the friction level. KW - MCA-modelling KW - Third body KW - Nanoparticles KW - Dry friction PY - 2012 DO - https://doi.org/10.1016/j.triboint.2011.11.018 SN - 0301-679X VL - 48 SP - 128 EP - 136 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-25469 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 N2 - Der mechanische Verschleiß ist ein Deformationsprozeß bei dem Verschleißteilchen durch Bruchvorgänge erzeugt werden. Hierbei verursachen Normal- und Tangentialkräfte elastische und plastische Deformationen, die zur Erzeugen von Rissen und zur Bildung loser Verschleißteilchen durch Brüche führen. In Abhängigkeit von den Beanspruchungsbedingungen, den mechanischen und thermischen Eigenschaften der Werkstoffe und der Kontaktgeometrie wird das Reibungs- und Verschleißverhalten wesentlich durch die sich bildende mechanische Mischschicht als dritter Körper zwischen den sich berührenden Werkstoffoberflächen bestimmt. Am Beispiel von Simulationsrechnungen mit der Methode der beweglichen zellularen Automaten (bzA) werden das Bildungs- und Transportverhalten von Verschleißteilchen dargestellt und Zusammenhänge zum zeitlichen Verschleißverlauf (Inkubationsphase, Einlaufverschleiß, stationärer Verschleiß) aufgezeigt. N2 - Mechanical wear “is a deformation process producing wear particles by some mechanism of fracture mechanics”. In the process normal and tangential (shearing) forces cause elastic and plastic deformations, generate cracks and form loose wear particles by fracture. Depending on the working conditions, the material properties and the real contact Situation (topography), a third body is formed as a mechanically mixed layer, which determines a different running-in and steady-state wear behaviour. For the approach represented here, 2D MCA Simulation results will be described by empirical equations, which are related to the incubation time (period without wear) and the following running-in and steady-state wear rates. T2 - 53. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß CY - Göttingen, Germany DA - 24.09.2012 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 -