Considerable scattering of experimental wear results affects seriously the evaluation of repeatability and reproducibility of tribological measurements and hampers detecting, studying, and verifying tribological laws. An accurate characterization of the statistics of results, the detection of the influence of operating parameters, and the verification of equations describing tribological phenomena can be achieved only through the analysis of large datasets with wide variation of parameters.

Taking advantage of more than 400 experiments performed with the same material pairing (100Cr6) under the same conditions (unlubricated, ball-on-disc configuration, reciprocating sliding) on four different tribometers, the repeatability and reproducibility of volumetric wear measurements has been evaluated. The effect of the tribometer used for the acquisition, of five operating parameters (frequency, number of cycles, stroke, velocity, and normal force), and of the friction coefficient could be characterised using Welch's unequal variances t-test.

The proportionality between volumetric wear and the product of sliding distance and normal force (sF_N) is described in Archard's law through the proportionality factor k, commonly known as wear coefficient. By testing Archard's law over seven orders of magnitude of sF_N, it was found that this law is not universally valid and that, under certain conditions, the wear coefficient depends on sF_N itself. An alternative equation for the dependence of the volumetric wear on sF_N is presented. The limits of the validity of Archard's law were investigated by varying the normal force and the sphere radius, using among others experiments with a reused, worn ball.

实验性磨损结果的大量散布会严重影响摩擦学测量结果的可重复性和可重复性的评估，并妨碍检测，研究和验证摩擦学定律。只有通过分析参数变化很大的大型数据集，才能准确地表征结果统计数据，检测运行参数的影响以及验证描述摩擦学现象的方程式的验证。

利用相同的材​​料对（100Cr6）在四个不同的摩擦计上在相同条件下（未润滑，圆盘配置，往复滑动）进行的400多次实验，评估了体积磨损测量的可重复性和可重复性。可以使用韦尔奇不等方差t检验来表征用于采集的摩擦计，五个操作参数（频率，循环数，冲程，速度和法向力）以及摩擦系数的影响。

体积磨损与滑动距离与法向力（sF _N）乘积之间的比例关系在阿卡德定律中通过比例系数k（通常称为磨损系数）进行了描述。通过在sF _N的七个数量级上测试阿卡德定律，发现该定律不是普遍有效的，并且在某些条件下，磨损系数取决于sF _N本身。提出了一个替代方程，表示体积磨损与sF _N的关系。通过改变法向力和球体半径，并使用一个重复使用的磨损球进行实验，研究了阿卡德定律有效性的极限。