Abstract Particle friction in railway ballast influences strongly the behaviour of ballasted tracks. New challenges posed on railway infrastructure increase the requirement for simulations, which need the friction coefficient as an input parameter. Measured friction coefficients of ballast stone contacts were found only in two studies, both under constant loads. In this work, two types of ballast were investigated in cyclic friction tests with incremental increase of the applied load after several cycles. Before each load increase, 3D-scans of some ballast stones allowed to calculate the contact area. Estimating the stress in the contact, the stress-dependency of the friction coefficient and wear were investigated. These experimental observations are discussed regarding their impact for friction modelling in the simulation of railway ballast.

中文翻译：

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铁路道碴石界面的摩擦磨损

摘要 铁路道碴中的颗粒摩擦对有碴轨道的性能影响很大。铁路基础设施面临的新挑战增加了对模拟的要求，需要将摩擦系数作为输入参数。测量的压载石接触摩擦系数仅在两项研究中发现，均在恒定负载下。在这项工作中，在循环摩擦试验中研究了两种类型的镇流器，在几个循环后逐渐增加施加的负载。在每次负载增加之前，一些压载石的 3D 扫描允许计算接触面积。估计接触中的应力，研究了摩擦系数和磨损的应力依赖性。讨论了这些实验观察结果对铁路道碴模拟中摩擦建模的影响。