具有自由滑动边的弹性四分之一或八分之一空间的非粘性和粘性触点

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2024-06-15 DOI:10.1007/s40544-024-0866-7
Qiang Li, Valentin L. Popov
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引用次数: 0

摘要

研究弹性四分之一空间或八分之一空间的接触时,条件是四分之一空间侧表面的运动受到限制:它可以沿着侧表面的平面自由滑动,但其法线运动却受到阻挡(例如,受到刚性墙壁的阻挡)。通过对弹性半空间施加镜像载荷,可以轻松解决这一接触问题。在这种边界条件下,使用快速傅立叶变换(FFT)辅助边界元法(BEM)对刚性球和弹性四分之一空间之间的非粘着接触和约翰逊-肯德尔-罗伯茨(JKR)型粘着接触进行了数值模拟。使用相同的思路研究了弹性八分之一空间的接触。根据球体相对于侧边的位置,可以观察到不同的接触行为。在粘着接触的情况下,粘着力首先随着与四分之一空间边缘距离的增加而增加,达到最大值,并在与边缘距离较大时进一步减小到 JKR 值。与半空间接触相比,粘附力的增强与边缘接触区域的针刺有关。我们提供了附着力图及其分析近似值,以及接触面和四分之一/八分之一空间内的压力分布。
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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Non-adhesive and adhesive contacts of an elastic quarter-or eighth-space with freely sliding sides

The contact of an elastic quarter- or eighth-space is studied under the condition that the movement of the side surface of the quarter-space is constrained: It can slide freely along the plane of the side surface but its normal movement is blocked (for example, by a rigid wall). The solution of this contact problem can be easily achieved by additionally applying a mirrored load to an elastic half-space. Non-adhesive contact and the Johnson-Kendall-Roberts (JKR)-type adhesive contact between a rigid sphere and an elastic quarter-space under such a boundary condition is numerically simulated using the fast Fourier transform (FFT)-assisted boundary element method (BEM). Contacts of an elastic eighth-space are investigated using the same idea. Depending on the position of the sphere relative to the side edge, different contact behavior is observed. In the case of adhesive contact, the force of adhesion first increases with increasing the distance from the edge of the quarter-space, achieves a maximum, and decreases further to the JKR-value in large distance from the edge. The enhancement of the force of adhesion compared to the half-space-contact is associated with the pinning of the contact area at the edge. We provide the maps of the force of adhesion and their analytical approximations, as well as pressure distributions in the contact plane and inside the quarter-/eighth-space.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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