Molecular dynamics study on friction of polymer material polyoxymethylene (POM)

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

Journal of Polymer Engineering Pub Date : 2024-06-10 DOI:10.1515/polyeng-2023-0260

Xinmin Li, Yifan Qian, Yonglong Wu, Zhengjie Qiu, Runzhi Zhang, Laishi Nie

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Abstract

Abstract Polyoxymethylene (POM) which shows good mechanical properties has a wide range of application in engineering. In this work, the nanoscale simulation method of molecular dynamics (MD) is used to make a more systematic simulation and calculation of the model of the resin material POM. With the application of software, the influence of friction depth, temperature, and sliding velocity on the frictional properties of POM was studied. The main conclusions are as follows: (1) In the range of 300 K–400 K, the temperature has little influence on the friction coefficient, but the fluctuation of friction force becomes larger as the temperature becomes larger. (2) When the friction depth increases, the plowing phenomenon and the accumulation of debris become more obvious and plastic deformation of POM increases. (3) When the friction velocity is changed, it is found that there is not much correlation between friction force and friction velocity, but as the friction velocity decrease, the friction force also decrease to a smaller extent. (4) The friction force will experience a growth period, and its value gradually stabilizes with some fluctuations, which are mainly caused by the atomic thermal motion, the effect of abrasive chip accumulation, and the release of stress energy caused by deformation.

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聚合物材料聚甲醛（POM）摩擦的分子动力学研究

摘要聚甲醛（POM）具有良好的机械性能，在工程领域有着广泛的应用。本研究采用分子动力学（MD）的纳米尺度模拟方法，对树脂材料 POM 的模型进行了较为系统的模拟和计算。应用软件研究了摩擦深度、温度和滑动速度对 POM 摩擦性能的影响。主要结论如下(1）在 300 K-400 K 的范围内，温度对摩擦系数的影响很小，但随着温度的升高，摩擦力的波动变大。(2）当摩擦深度增加时，耕犁现象和碎屑堆积更加明显，POM 的塑性变形增加。(3) 当摩擦速度发生变化时，摩擦力与摩擦速度的相关性不大，但随着摩擦速度的减小，摩擦力的减小幅度也较小。(4) 摩擦力会经历一个增长期，其值会逐渐稳定，并伴有一些波动，这主要是由原子热运动、磨屑堆积的影响以及变形引起的应力能释放造成的。

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

Journal of Polymer Engineering 工程技术-高分子科学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

2.5 months

期刊介绍： Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.