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Concept and assessment of the novel design of tribological tester
Measurement ( IF 5.6 ) Pub Date : 2020-11-18 , DOI: 10.1016/j.measurement.2020.108724
W. Żurowski , J. Zepchło , D. Kanaška , M. Rucki

In the paper, the novel design of tribological tester was proposed making possible to avoid undesirable impact of the used friction surface on the measurement results. Its important merit is the continuous removal of worn material of tested sample, which contributes also to the thermal stability of sliding surfaces. Special design of the measuring head compensates the dimensional changes of the worn sample during the test. In order to assess the capability of proposed measurement system, the sample pins were made out of aluminum, copper and iron. Since the output signal revealed distribution close to normal, Gaussian statistics was applied to uncertainty estimation and repeatability test. It was demonstrated that the uncertainty of friction force measurement was highly dependent on the tested material, but the proposed design provided 60% and even 80% smaller respective standard uncertainty ranges than the conventional pin-to-disc tribometer. Repeatability percentage calculated as %EV = 13.4% was found satisfactory, because it covered all irregularities of the sliding parts, including changes of worn material properties during the test. Variation %EV obtained for typical tribometer T-01M was 2.5 times larger.



中文翻译:

摩擦测试仪新颖设计的概念与评估

在本文中,提出了一种新颖的摩擦测试仪设计,可以避免用过的摩擦表面对测量结果产生不良影响。它的重要优点是连续清除测试样品的磨损材料,这也有助于滑动表面的热稳定性。测量头的特殊设计可以补偿测试过程中磨损样品的尺寸变化。为了评估建议的测量系统的功能,采样针由铝,铜和铁制成。由于输出信号显示分布接近正常值,因此将高斯统计应用于不确定性估计和可重复性测试。结果表明,摩擦力测量的不确定性高度取决于被测材料,但是与传统的针-盘摩擦计相比,建议的设计提供了60%甚至80%的标准不确定度范围。重复性百分比计算为%EV  = 13.4%被认为是令人满意的,因为它涵盖了滑动部件的所有不规则性,包括在测试过程中磨损材料特性的变化。 对于典型的摩擦计T-01M,获得的EV变异百分数大2.5倍。

更新日期:2020-11-18
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