Research on friction and wear properties of new energy micro logistics vans brake materials under different ambient temperature and humidity conditions

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-07-24 DOI:10.1016/j.wear.2024.205511
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引用次数: 0

Abstract

This study explores the friction and wear performance of brake materials for new energy micro logistics vans under different ambient temperature (3 °C, 23 °C, 43 °C) and humidity conditions (35 %, 65 %, 95 %) using pin-disc experimental device. The findings reveal that at 3 °C, the friction coefficient exhibits extreme sensitivity to changes in humidity, with a significant reduction as humidity increases. Simultaneously, the increase of humidity leads to the transition from adhesive wear to abrasive wear and fatigue wear. At room temperature (23 °C) and 43 °C, humidity has minimal impact on the friction coefficient; however, higher humidity promotes oxidation film formation on the friction surface leading to dominant oxidation wear. Notably, in low-humidity environments, temperatures at 3 °C and 43 °C cause severe brake pad wear. The severity is greater at 43 °C because the resin-based components within the brake pad material decompose at elevated temperatures. Under such circumstances, appropriately increased humidity helps mitigate brake pad wear rates. However, too much humidity can increase fatigue wear of brake pad materials.

新能源微型物流车制动材料在不同环境温湿度条件下的摩擦磨损性能研究
本研究利用针盘实验装置,探讨了新能源微型物流车制动材料在不同环境温度(3 °C、23 °C、43 °C)和湿度条件(35 %、65 %、95 %)下的摩擦和磨损性能。研究结果表明,在 3 °C 时,摩擦系数对湿度变化极为敏感,随着湿度的增加,摩擦系数显著降低。同时,湿度的增加导致从粘着磨损过渡到磨料磨损和疲劳磨损。在室温(23 °C)和 43 °C条件下,湿度对摩擦系数的影响极小;然而,较高的湿度会促进摩擦表面氧化膜的形成,从而导致主要的氧化磨损。值得注意的是,在低湿度环境中,3 °C 和 43 °C 的温度会导致刹车片严重磨损。43 °C 时磨损更严重,因为刹车片材料中的树脂成分会在高温下分解。在这种情况下,适当增加湿度有助于降低刹车片的磨损率。不过,湿度过高会增加刹车片材料的疲劳磨损。
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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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