Table 8 Friction and loading force statistics
From: Investigation of Two-Dimensional Ultrasonic Surface Burnishing Process on 7075-T6 Aluminum
T5 N | O5 N | T15 N | O15 N | T25 N | O25 N | T35 N | O35 N | ||
|---|---|---|---|---|---|---|---|---|---|
Friction force | Average value | 2.22 | 2.25 | 6.20 | 6.22 | 10.18 | 10.33 | 14.34 | 14.49 |
Interquartile range | 0.725 | 0.691 | 2.876 | 2.223 | 4.311 | 4.185 | 6.960 | 5.762 | |
Coefficient of variation | 0.262 | 0.262 | 0.324 | 0.297 | 0.333 | 0.331 | 0.354 | 0.355 | |
Loading force | Average value | 4.99 | 4.99 | 14.99 | 14.99 | 24.99 | 24.99 | 34.97 | 34.95 |
Interquartile range | 0.648 | 0.585 | 1.503 | 1.401 | 2.456 | 2.036 | 2.964 | 2.254 | |
Coefficient of variation | 0.086 | 0.070 | 0.059 | 0.051 | 0.052 | 0.047 | 0.048 | 0.041 |