Does ultra-mild wear play any role for dry friction applications, such as automotive braking?

Does ultra-mild wear play any role for dry friction applications, such as automotive braking?
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超轻微磨损对于干摩擦应用(例如汽车制动)有作用吗?

DOI:
10.1039/c2fd00117a
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发表时间:
2012
影响因子:
3.4
通讯作者:
Kloß H.
Kloß H.
中科院分区:
化学2区
文献类型:
--
作者:
Österle. W;Dmitriev A.I;Kloß H.

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纳米结构的第三主体薄膜和/或第一主体表面处磨损碎片的存储被认为是在超温和磨损条件下滑动的先决条件。由于已经在刹车片和刹车盘上通过实验观察到这些特征,因此尝试使用基于可动元胞自动机 (MCA) 的方法在纳米尺度上建模来研究它们的滑动行为。该模型可以系统地研究不同纳米结构的影响,并评估不同刹车片成分对滑动接触处的滑动行为、速度调节和摩擦力稳定性的影响。除了对之前发布的建模结果进行回顾之外,还提供了一些额外的新图表,可以更好地实现动态过程的可视化。尽管超温和磨损条件被认为对于实现所需的摩擦学性能至关重要,但也研究了向细观和宏观磨损机制的转变。最终结论是,超轻度磨损和相应的平滑滑动行为在汽车制动过程中发挥着重要作用,尽管暂时和局部的严重磨损事件可能会导致摩擦不稳定、表面损坏和粗大磨损颗粒的释放。
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.
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发表时间: 2008
影响因子: 6.2
作者:
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DOI: --
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DOI: --
发表时间: 2009
期刊:
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