Experimental and numerical study of the running-in wear coefficient during dry sliding contact
Experimental and numerical study of the running-in wear coefficient during dry sliding contact
复制标题
干滑动接触磨合磨损系数的实验与数值研究
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
M. Khonsari
中科院分区：
文献类型：
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作者：
Sahar Ghatreh Samani;S. Akbarzadeh;M. Khonsari
摩擦副的稳态性能在很大程度上受其磨合时的工作条件的影响。为了深入了解操作条件的影响，使用针盘式试验台进行了实验，以评估不同负载和速度组合下的磨合时间。在磨合过程中，测量了磨损率和磨尖高度、摩擦系数、摩擦系数的算术平均值。结果表明，磨合期的暂态特性受加载条件的影响较大。在稳态期开始时，表面粗糙度、磨损系数和摩擦系数达到平稳状态。然而，稳态摩擦磨损行为受到与磨合期相关的瞬态历史的影响。利用连续损伤力学（CDM）的原理，建立了一个预测模型来预测瞬态和稳态状态下的磨损系数。实测磨损系数与计算磨损系数的比较显示出可接受的一致性。
The steady-state performance of a tribo-pair is influenced, to a great extent, by the operating conditions at which it is run-in. To gain insight into the influence of operating conditions, experiments are conducted using a pin-on-disk test rig to evaluate the running-in duration under a combination of different loads and speeds. The wear rate and the arithmetic average of asperity heights, R a , and friction coefficient are measured during the running-in period. It is shown that the transient behavior during the running-in period is significantly influenced by the loading condition. At the onset of the steady-state period, the surface roughness, the wear coefficient, and friction coefficient reach a plateau. However, the steady-state friction and wear behavior is influenced by the transient history associated with the running-in period. A predictive model is developed that utilizes the principles of the continuum damage mechanics (CDM) to predict the wear coefficient for transient and steady regimes. Comparisons of the measured wear coefficient and the calculated wear coefficient show acceptable agreement.