Table 1 Explanation of regression parameters of Eq. (1)
Parameter | Description |
|---|---|
\(x\) | Number of cycles |
\(a\) | Friction level at end of test (x = 200) |
\(- b^{x + c}\) | Increase of friction at begin of test (non-linear section) |
\(d \cdot \left( {x - 200} \right)\) | Slope in linear section |