Influences of Sharkskin Texture on Lubrication Performance of Elastic Bearing Friction Pairs

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-08-07 DOI:10.1007/s11249-024-01903-y
Lixia Xue, Zhijun Yan, Yuanyuan Jiang, Tao Sun
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Abstract

Inspired by the shark skin shield scale structure and the excellent elasticity of shark skin, an elastic texture composed of the arc grooves and the rectangular convex structure evenly arranged in the lower layer is constructed to improve the lubrication performance of the friction pair. Under different geometric parameters and speeds, the elastic deformation, stress distribution, friction coefficient, and oil film bearing capacity of the friction pair are compared to analyze the influence of sharkskin texture on the lubrication performance. Firstly, the fluid–solid coupled method establishes a 3D simulation model of the elastic hydrodynamic lubrication. Additionally, the elastomeric bearing specimens with sharkskin bionic texture are fabricated using 3D printing technology, and visualization experiments are performed to validate the simulation results. During the sliding friction process, the shark skin texture can appropriately intensify elastic deformation and uniform overall stress distribution. With the increase in the dimensionless width of the rectangular convex structures, the overall elastic deformation intensifies, the bearing capacity of the oil film thickens, and the friction coefficient decreases. In this study, when the depth-width ratio of the arc groove is 0.1 and the dimensionless width of the rectangular convex structures is 0.125, the friction coefficient of the elastic bearing is the minimum, and the maximum reduction percentage is about 15.3%.

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鲨鱼皮纹理对弹性轴承摩擦副润滑性能的影响
受鲨鱼皮盾牌鳞片结构和鲨鱼皮优异弹性的启发,在下层构建了由弧形凹槽和均匀分布的矩形凸起结构组成的弹性纹理,以改善摩擦副的润滑性能。在不同几何参数和速度下,对比摩擦副的弹性变形、应力分布、摩擦系数和油膜承载能力,分析鲨鱼皮纹理对润滑性能的影响。首先,流固耦合方法建立了弹性流体动力润滑的三维模拟模型。此外,利用三维打印技术制作了具有鲨鱼皮仿生纹理的弹性轴承试样,并进行了可视化实验来验证模拟结果。在滑动摩擦过程中,鲨鱼皮纹理能适当加剧弹性变形,并使整体应力分布均匀。随着矩形凹凸结构无量纲宽度的增加,整体弹性变形加剧,油膜承载能力增大,摩擦系数减小。在本研究中,当弧形槽的深宽比为 0.1,矩形凸结构的无量纲宽度为 0.125 时,弹性支座的摩擦系数最小,最大降低百分比约为 15.3%。
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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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