磨损进行时:第三体流如何控制表面损伤

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-07-02 DOI:10.1007/s11249-024-01875-z
Olivier Bouillanne, Guilhem Mollon, Aurélien Saulot, Sylvie Descartes, Nathalie Serres, Guillaume Chassaing, Karim Demmou
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引用次数: 0

摘要

在干燥条件下的机械接触通常会有一层被称为 "第三体 "的界面层,这层界面层通常是由表面退化产生的,但其材料特性可能有很大差异。该层是过去磨损的直接结果,但也对接触表面继续磨损的速度起到控制作用。因此,对机械接触的全面理解有赖于描述剪切层和限制剪切层的运动表面之间相互作用的理论。在本文中,我们通过定量研究第三体的流动机制与施加在表面上的机械载荷之间的联系,向这种理论迈出了一步。为此,我们采用了以前开发的基于多体无网格方法的固体流动局部模型,以模拟实验中发现的特征流动状态。然后对表面承受的典型应力集中模式进行描述和量化,并使用一个简单的损坏模型来演示这种模型如何进行磨损预测。我们证明,团聚流状态容易对表面造成大面积、深层次的破坏,而颗粒状第三体流的破坏作用则较为有限、较浅。
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Wear in Progress: How Third Body Flow Controls Surface Damage

Mechanical contacts in dry conditions are often characterized by an interfacial layer called “third body”, which generally originates from the degradations of the surfaces, but which can exhibit strongly different material properties. This layer is a direct consequence of past wear, but also exerts a control on the rate at which surfaces in contact will keep getting worn. A comprehensive understanding of mechanical contacts therefore relies on a theory describing the interplay between this sheared layer and the moving surfaces which confine it. In this paper, we make a step towards such a theory by quantitatively investigating the link between the flow regime of the third body and the mechanical loading it applies to the surfaces. For that purpose, a previously developed local model of solid flow based on the Multibody Meshfree Approach is employed, in order to simulate characteristic flow regimes identified in experiments. Typical stress concentration patterns endured by the surfaces are then described and quantified, and a simple damage model is used to demonstrate how such a model could lead to wear prediction. We demonstrate that agglomerated flow regimes are prone to enhance large and deep damaging of surfaces, while granular third body flows have a more limited and shallow damaging effect.

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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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