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ZDDP衍生的tribofilms的时间依赖接触行为:一种粘弹性分层模型方法

Dongze Wang¹, Ali Ghanbarzadeh¹, Nan Xu¹

¹School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT UK.

Tribology letters

|May 7, 2025

概括

由二甲基二甲基酸盐 (ZDDP) 衍生出的 tribofilms 显示粘弹性行为. 虽然在某些条件下表现出时间依赖的特性,但由于典型的滑动速度,它们通常在实际应用中充当软弹性层.

科学领域:

材料科学材料科学材料科学
部落学 (tribology) 是一个学科.
机械工程机械工程

背景情况:

已知由二甲基二甲基酸盐 (ZDDP) 衍生出的 tribofilms 是粘性弹性的.
之前的研究使用汉堡材料模型建模了tribofilm爬行合规性.
了解这些薄膜的接触力学对于预测它们的性能至关重要.

研究的目的:

为分层材料开发一个接触模型,扩展现有的粘弹性半空间模型.
通过使用分析频率响应函数,研究ZDDP衍生的 tribofilms 的粘弹性行为.
分析操作条件对ZDDP tribofilms的时间依赖性特征的影响.

主要方法:

扩展了一种粘弹性半空间接触模型,以考虑分层材料.
将分析频率响应函数转换为影响系数.
模拟在碳钢球上缩和滑动时的接触行为.

主要成果:

当模拟为半空间时,ZDDP tribofilms表现出类似流体的反应.
作为基板上的薄膜,它们在低负荷和低速度下表现出时间依赖的行为 (爬行,应力放松).
在适度滑动速度 (mm/s 到 m/s) 时,无论负载如何,时间依赖的效应变得可以忽略不计.

结论:

由ZDDP衍生出的 tribofilms 具有显著的粘性弹性.
由于典型的操作速度,它们的实际行为往往模仿软弹性层.
开发的接触模型为ZDDP tribofilms复杂的机械反应提供了洞察力.

关键词:

接触力学接触力学有层次的接触接触.粘性弹性粘性弹性在 ZDDP 中,ZDDP 在 ZDDP 中.

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