橡胶在表面粗糙度较大的硬质基体上摩擦的光谱磨损模型

IF 2.9 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2023-12-13 DOI:10.1098/rspa.2023.0587
H. Tanaka, S. Yanagihara, K. Shiomi, T. Kuroda, Y. Oku
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引用次数: 0

摘要

软硬物质摩擦是一个长期存在的摩擦学问题,至今仍未得到澄清,需要工程师根据经验预测磨损寿命。为了澄清这一问题,本研究探讨了橡胶在硬质粗糙基体上的瞬态磨合机制,并利用两种材料的表面粗糙度频谱曲线建立了时间磨损进展模型。通过一系列摩擦试验和三维表面高度测量,功率谱密度(PSD)随时间变化的行为分为两个阶段,即初始非稳定阶段和长期稳定阶段。通过对初始阶段磨损橡胶表面的详细光谱分析,得出了介于自亲和表面模型和 K - 相关表面模型之间的混合 PSD 函数,该函数由一个变量(赫斯特指数)组成,该变量因基底自亲和而饱和。在格林伍德-威廉姆森粗糙接触力学理论的支持下,混合 PSD 函数的体积估计值被用于评估稳定阶段磨损碎片的体积率,并得到了实验验证。这些发现不仅改进了根据磨损表面的初始测量结果对软材料磨损的预测,还有助于阐明磨损的多尺度约束机制。
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Spectral wear modelling of rubber friction on a hard substrate with large surface roughness
Soft-hard matter friction is a long-standing tribology problem that remains unclarified, requiring engineers to empirically predict the wear life. To clarify this issue, this study examines the transient running-in regime of rubber friction on a hard rough substrate and models the temporal wear progression using the spectrum curves of surface roughness for both materials. Performing a series of friction tests and three-dimensional surface-height measurements, the time-dependent behaviours of the power spectral densities (PSDs) are divided into two phases, namely the initial non-steady and long-term steady phases. The detailed spectral analyses of worn rubber surfaces in the initial phase lead to a blended PSD function between self-affine and K -correlation surface models, consisting of one variable (the Hurst exponent) that is saturated by the substrate self-affinity. Supported by the Greenwood–Williamson theory concerning rough contact mechanics, the volumetric estimate with the blended PSD function is used to assess the volume rate of wear debris in the steady phase, which is validated experimentally. These findings not only improve the wear predictions of soft materials from the initial measurements of worn surfaces but also help clarify the constrained multiscale mechanism of wear.
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来源期刊
CiteScore
6.40
自引率
5.70%
发文量
227
审稿时长
3.0 months
期刊介绍: Proceedings A has an illustrious history of publishing pioneering and influential research articles across the entire range of the physical and mathematical sciences. These have included Maxwell"s electromagnetic theory, the Braggs" first account of X-ray crystallography, Dirac"s relativistic theory of the electron, and Watson and Crick"s detailed description of the structure of DNA.
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