Comparative analysis of pin-on-disc and inertia-dynamometer sliding tests on a friction material

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-08-22 DOI:10.1016/j.wear.2024.205552
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引用次数: 0

Abstract

The development of modern brake systems requires the assessment of multiple aspects. Among these, parameters related to the tribological behaviour, vibration, and particulate matter emission are typically evaluated using inertia dynamometers and tribometers. While these two testing systems have been previously compared regarding emissions and tribological behaviours, vibrations were not compared, nor have all these aspects been examined simultaneously. This study investigates the scale effects between a pin-on-disc tribometer and a reduced-scale dynamometer operating under dragging conditions with two levels of pressure and velocity, and a disc temperature not exceeding 260 °C. Regarding the vibration, the pin-on-disc exhibited higher and broader values in the normal direction, 1.3–15.5 m/s2, than the reduced-scale dynamometer, 0.37–0.42 m/s2, while the tangential vibrations exceeded those in the normal direction in both systems. The wear rates in the two systems were overall similar, in the range of 1–4 e−14 m2/N. During the tests the disc temperature in the dynamometer increased at a higher rate compared to the pin-on-disc, affecting the tribological and emission behaviours: steady state values were obtained only in the pin-on-disc tests. The particulate concentration values observed during dynamometer tests better correlated with the peak values from pin-on-disc tests rather than with the steady-state values. This study highlights the importance of including transient values in the evaluation of pin-on-disc testing.

摩擦材料上的盘上销和惯性动力计滑动试验对比分析
现代制动系统的开发需要对多个方面进行评估。其中,与摩擦学行为、振动和微粒物质排放相关的参数通常使用惯性功率计和摩擦计进行评估。虽然这两种测试系统以前在排放和摩擦学行为方面进行过比较,但没有对振动进行过比较,也没有同时对所有这些方面进行过检查。本研究调查了针盘摩擦磨损试验机和缩小比例测功机在拖曳条件下的比例效应,拖曳条件包括两级压力和速度以及不超过 260 °C 的圆盘温度。在振动方面,针盘式摩擦磨损试验机在法线方向的振动值(1.3-15.5 m/s2)比缩小比例测功机的振动值(0.37-0.42 m/s2)更高、更宽,而两个系统的切向振动都超过了法线方向的振动值。两个系统的磨损率总体上相似,都在 1-4 e-14 m2/N 之间。在测试过程中,测功机中的圆盘温度比针盘上的温度上升得更快,从而影响了摩擦学和排放行为:只有在针盘上的测试中才能获得稳定状态值。在测功机测试中观察到的颗粒浓度值与盘上销钉测试的峰值相关性更好,而不是与稳态值相关。这项研究强调了将瞬态值纳入针盘测试评估的重要性。
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来源期刊
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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