Effect of Wear-Induced Surface Deformation on Stick–Slip Friction of Galvanized Automotive Steels

Abstract

This study examined the influence of worn surfaces on the stick−slip friction of galvanized automotive steel and revealed the intrinsic role of surface topography parameters in the stick−slip friction with wear. The results show that the surface deformation induced by wear significantly affects the stick−slip friction. The stick−slip friction can be suppressed by increasing the vertical area of the surface deformation because of reductions in the difference between the static and kinetic friction coefficients. The friction behavior changes from stick−slip friction to smooth sliding when the skewness exceeds a critical value, thus suggesting that this parameter can be used as an effective surface topography parameter to describe the stick−slip friction of galvanized automotive steel with worn surfaces. The findings can help improve the understanding of the mechanism of the stick−slip friction of materials with worn surfaces and provide an approach to suppress the noise and vibration caused by the stick−slip friction of galvanized automotive steel.

Analysis of friction‐related acoustic emission in bolted joint structures

“…In this case, some scratches may have formed on the bolted joint contact interfaces. Characterizing the surface microtopography and wear debris state is beneficial to understanding the friction behaviors between bolted interfaces 24,25 . Taking the moving specimen as an example, a white light interferometer (Nanomap‐1000WLI) is used to measure the 3‐D topography of the partial area of the contact surface, and the field of view of each measurement is 1 × 1 mm.…”

“…Characterizing the surface microtopography and wear debris state is beneficial to understanding the friction behaviors between bolted interfaces. 24,25 Taking the moving specimen as an example, a white displacement between the interfaces is relatively large, and the shearing and fracture of the asperities are more likely to occur. As a result, the peak-to-valley height of the surface will decrease and the relative surface heights basically do not exceed 10 μm.…”

Investigation and Analysis of Influential Parameters in Bottomhole Stick–Slip Calculation during Vertical Drilling Operations

“…The combined effects of wear and heat diminish the bit's drilling efficiency, reducing its ability to penetrate the formation effectively. Importantly, studies by Hao et al [37] emphasize that surface deformations on the bit induced by wear play a significant role in influencing stick-slip friction. Therefore, the intricate relationship between increased rotation speed, heightened frictional forces, bit wear, and their direct impact on stick-slip underscores the importance of carefully managing rotation speeds in drilling operations.…”