Hydrodynamic lubrication effects in textured PEEK surfaces for friction reduction.

Discover mechanical engineering Pub Date : 2025-01-01 Epub Date: 2025-09-29 DOI:10.1007/s44245-025-00130-6

Christopher W Harris, Omid Doustdar, Arvin Taghizadeh Tabrizi, Ali M Al-Qahtani, Amir M Hajiyavand, Karl D Dearn

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Abstract

The tribology of dimple-shaped textures is investigated within a reciprocating polymeric sliding couple of Invibio poly-ether-ether-ketone (grade 450G). A novel theoretical model was developed for this aim, describing hydrodynamic pressure and frictional force due to surface modifications. Experiments show reduced friction across all textures compared to un-textured surfaces. The parameters of texture depth (5-20 µm) and diameter (50-200 µm) were isolated to analyse the effect of each independently. The diameter showed good agreement with the model; however, depth showed variation at the extremities of the parameters examined. The experimental friction force captured over a single stroke was compared to the instantaneous theoretical friction force, and good agreement was found in the form of the friction trace within the hydrodynamic region of a reciprocating stroke. The texture parameter combination of 50 µm diameter and 20 µm depth showed the most significant reduction in friction at 48.7%.

Graphical abstract:

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用于减少摩擦的聚醚醚酮纹理表面的流体动力润滑效果。

在Invibio聚醚醚酮（450G级）的往复聚合物滑动偶对中研究了韧窝状织构的摩擦学。为此建立了一个新的理论模型，描述了由于表面修饰引起的动水压力和摩擦力。实验表明，与没有纹理的表面相比，所有纹理的摩擦都减少了。分离纹理深度（5 ~ 20µm）和直径（50 ~ 200µm）参数，分别独立分析其影响。直径与模型吻合较好；然而，深度在所检查参数的极值处显示出变化。将单次行程的实验摩擦力与瞬时理论摩擦力进行了比较，发现在往复行程的流体动力区域内的摩擦痕迹形式很好地吻合。直径为50µm、深度为20µm的织构参数组合对摩擦的降低效果最为显著，为48.7%。图形化的简介:

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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Discover mechanical engineering

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