Adjustable tribological properties in metal / plastic sliding pairs by combining hybrid plastic-based materials on different length scales

聚合物材料和聚合物基复合材料已经在摩擦学系统中使用了几十年。然而，摩擦学性能取决于载荷的事实仍然是使用这种材料的一个关键限制。在低负荷条件下表现良好的材料可能在高负荷下表现不佳，反之亦然。由于技术系统在使用过程中发生的负载通常会随着时间的推移而变化，因此在所有预期的操作条件下确保可靠性是具有挑战性的。本研究的目的是将不同的摩擦学改性材料组合成层状复合材料。通过将具有不同最佳工作点的材料组合在一起，得到的复合材料应在几个不同的工作点或在广泛的工作条件下表现出良好的摩擦学性能。具有不同弹性模量的基板层可以在层状复合材料的设计中提供额外的自由度，因为它们允许调整单个组件的接触压力。通过结合摩擦学实验和数值模拟，可以对多层复合材料性能的决定机制有一个全面的了解。

Polymer materials and polymer-based composites have been used in tribological systems for decades. However, the fact that tribological properties are dependent on the load remains a key limitation for the use of such materials. A materials that performs well at low load conditions may perform poorly at higher loads and vice versa. Since the loads the occur during the use of technical systems typically vary over time, it is challenging to ensure reliability under all expected operating conditions. The aim of this study is to combine different tribologically modified materials into layered composites. By combining materials with different optimal operating points, the resulting composites should exhibit good tribological properties at several distinct operating points or across a wide range of operating conditions. Substrate layers with strongly different elastic moduli can provide additional degrees of freedom in the design of layered composites because they allow for an adjustment of the contact pressures of the individual components. By combining tribological experiments and numerical simulations, a thorough understanding of the mechanisms that determine the properties of multilayer composites can be obtained.