Modeling of surface texturing in hydrodynamic lubrication

“…Laser surface texturing is used to improve the tribological properties of coatings, ceramics, and metallic materials [18][19][20][21]. The effects of laser surface texturing on the thickness of lubricant film were also investigated [22][23][24]. Gropper et al [25] reviewed the key findings in texture design and modelling techniques, which provides an important contribution to the research of texture.…”

Section: Introductionmentioning

confidence: 99%

Tribological properties of textured stator and PTFE-based material in travelling wave ultrasonic motors

Zeng

Liu

et al. 2019

Friction

View full text Add to dashboard Cite

This study fabricated textures on the stator surface of a traveling wave ultrasonic motor (USM) using laser and investigated the tribological behavior of a polytetrafluoroethylene (PTFE) composite friction material and stator. Initially, the effect of textures with different densities was tested. As the results suggested, the generation of large transfer films of PTFE composite was prevented by laser surface texturing, and adhesive wear reduced notably despite the insignificant decrease in load capacity and efficiency. Next, the 100-h test was performed to further study the effects of texture. Worn surface and wear debris were observed to discuss wear mechanisms. After 100 h, the form of wear debris changed into particles. The wear mechanisms of friction material sliding against the textured stator were small size fatigue and slight abrasive wear. The wear height of friction material decreased from 3.8 μm to 1.1 μm. This research provides a method to reduce the wear of friction materials used in travelling wave USMs. Friction 8(2): 301-310 (2020) | https://mc03.manuscriptcentral.com/friction Jinbang LI. He received his M.S. and Ph.D degrees in mechanical engineering from Harbin Institute of Technology, Harbin, China, in 2011 and 2016, respectively. He joined the School of Mechanical Engineering and Mechanics at Ningbo University from 2016. His research areas cover the tribological problems in ultrasonic motors, the development of polymer-based friction material and the effect of laser surface texturing on friction and wear of materials.

show abstract

“…Micro-textures have proved to significantly enhance the tribological behavior of contacting surfaces in relative motion. Substantial advantages of surface micro textures in different practical applications have been revealed through the various theoretical and experimental findings published in literature (Etsion, 2005(Etsion, , 2013Cupillard et al, 2008;Maharshi et al, 2018). In most of the studies mentioned in the literature, micro-textures are provided over the contact surface domain in the form of micro dimples.…”

Section: Introductionmentioning

confidence: 99%

Influence of MHD Lubrication and Textured Surface in EHL Line Contact

2019

View full text Add to dashboard Cite

The present numerical study investigates the combined effect of micro-texture and magneto hydrodynamic lubrication behavior on the performance of elastohydrodynamic lubrication (EHL) line contact. Micro-textures, which are found in the inlet zone of a contacting surface, are studied, and modified Reynolds, elasticity, and load balance equations have been solved using Finite element analysis (FEA) and Generalized Minimal Residual Method (GMRES). A parametric study has been performed to optimize the micro-texture shapes in the contacting surfaces for different values of magneto hydrodynamic lubricant parameters. The numerical results show that increasing externally applied magnetic field and micro-texture shapes enhances the values of performance parameter of EHL line contact. Finally, the variation in the steady-state EHL characteristics pertaining to unidirectional pure sliding contacts due to an artificially produced inlet zone of micro-texture shapes (IZMTS) is investigated numerically. The enhancement in central and minimum film thickness is found to be up to 38 and 28% respectively, along with 33.28% reduction in coefficient of friction.

show abstract

Modeling of surface texturing in hydrodynamic lubrication

Cited by 176 publications

References 31 publications

Looking into a laser textured piston ring-liner contact

Looking into a laser textured piston ring-liner contact

Tribological properties of textured stator and PTFE-based material in travelling wave ultrasonic motors

Influence of MHD Lubrication and Textured Surface in EHL Line Contact

Contact Info

Product

Resources

About