Estimation of the friction coefficient by identifying the evolution of rough surface topography

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-10-28 DOI:10.1063/5.0230431

Dafei Huang, Wurui Ta, Youhe Zhou

引用次数: 0

Abstract

The complexity and randomness of surface roughness make the origin of friction always puzzling. Is there a potential correlation mechanism between the evolution of friction force and surface topography, and is it possible to estimate the friction coefficient from the topography evolution? Here, we explore the evolution of surface topography in metallic materials during friction by defining the characteristic orientation of the surface and analyzing its changes over time, which closely mirrors the behavior of friction forces. Then, we propose a simple relationship that relates the characteristic orientation and friction force via the friction coefficient. Therefore, the friction coefficient can be evaluated based on topography evolution without relying on any theoretical modeling assumptions. These results reveal the mechanism between complex surface topography and friction force through a simple formula and provide a method to estimate the friction coefficient. This method has promising applications when the friction coefficient is difficult to measure, such as in large-scale landslides and geologic faults.

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通过识别粗糙表面地形的演变估算摩擦系数

表面粗糙度的复杂性和随机性使得摩擦力的起源总是令人费解。摩擦力的演变与表面形貌之间是否存在潜在的相关机制，是否可以通过形貌演变来估算摩擦系数？在此，我们通过定义金属材料表面的特征取向并分析其随时间的变化来探索摩擦过程中表面形貌的演变，这与摩擦力的行为密切相关。然后，我们提出了一种简单的关系，通过摩擦系数将特征取向和摩擦力联系起来。因此，可以根据地形演变来评估摩擦系数，而无需依赖任何理论建模假设。这些结果通过一个简单的公式揭示了复杂表面地形与摩擦力之间的机理，并提供了一种估算摩擦系数的方法。在摩擦系数难以测量的情况下，如大规模滑坡和地质断层中，该方法具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.