Friction Force During Lubricated Steady Sliding of a Rigid Cylinder on a Viscoelastic Substrate
Friction Force During Lubricated Steady Sliding of a Rigid Cylinder on a Viscoelastic Substrate
复制标题
刚性圆柱体在粘弹性基底上润滑稳定滑动时的摩擦力
DOI:
10.1007/s11249-020-01396-5
复制
发表时间:
2021
影响因子:
3.2
通讯作者:
Khripin, Constantine
中科院分区:
文献类型:
--
作者:
Hui, Chung-Yuen;Wu, Haibin;Jagota, Anand;Khripin, Constantine
We study the friction force during lubricated sliding of a rigid cylindrical indenter against a viscoelastic substrate in the iso-viscous visco-elasto-hydrodynamic lubrication (VEHL) regime. The substrate is represented by a foundation model. The solution is controlled by three dimensionless parameters. The first of these,λ,measures the time for the indenter to move one contact zone relative to the viscoelastic relaxation time; the second is the ratio of the long time to short time compliance of the substrate,; the third parameter,β, is the ratio of average fluid flow rate to the sliding velocity. Although our solution works well for the full range of parameters, we focus on the “Hertz” regime (β>>1) where practically all the fluid in the contact region is squeezed out. This regime is quite common in soft contact lubrication problems and presents significant numerical difficulties. Our analysis gives insight into why these numerical difficulties arise. The friction force can be decomposed into two parts, one due to viscoelastic dissipation and the other from hydrodynamics. Although these two are generally coupled, in the Hertz limit, an important result is that the viscoelastic portion of the friction force can be well approximated by the solution of the corresponding “dry” sliding problem, in which there is no lubricating fluid layer. This provides a simple way to decouple the hydrodynamic portion of the friction force from the viscoelasticity of the substrate. We study how hydrodynamic pressure and film thickness vary with the controlling dimensionless parameters. Scaling laws for these relationships are given in closed form.
登录
查看更多内容
DOI:
--
发表时间:
1949
期刊:
影响因子:
--
作者:
L. S. Martz
通讯作者:
L. S. Martz
影响因子:
4.7
作者:
Haibin Wu;N. Moyle;A. Jagota;C. Khripin;Florian Brémond;C. Hui
通讯作者:
C. Hui
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
A. A. Elsharkawy
通讯作者:
A. A. Elsharkawy
影响因子:
3.9
作者:
N. Moyle;Zhenping He;Haibin Wu;C. Hui;A. Jagota
通讯作者:
A. Jagota
DOI:
--
发表时间:
1961
期刊:
影响因子:
--
作者:
E. Okrent
通讯作者:
E. Okrent