Visco-elastohydrodynamic lubrication of layered materials with imperfect layer-substrate interfaces

Tao He, Q. Jane Wang*, Xin Zhang, Yuchuan Liu, Zhe Li, Hun June Kim, Seongchan Pack

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


This paper reports a novel visco-elastohydrodynamic lubrication (VEHL) model for the lubrication interface formed by a rigid sphere and a viscoelastic layer imperfectly coated on an elastic half-space, aiming to study the effects of layer viscoelasticity and imperfect layer-substrate interface on the lubrication behavior. The surface viscoelastic deformation is calculated based on a linear viscoelastic model and the correspondence principle. The contact solution is formulated with the discrete convolution and fast Fourier transform (DC-FFT) algorithm by using the influence coefficients (ICs) converted from frequency response functions (FRFs). The model is validated by using the results from its degenerated versions through comparisons with available published data. The new VEHL model is implemented to explore the effects of surface speed, layer thickness, and layer-substrate elastic modulus ratio, as well as the degree of displacement discontinuity or stiffness defect at the layer-substrate interface.

Original languageEnglish (US)
Article number105993
JournalInternational Journal of Mechanical Sciences
StatePublished - Jan 1 2021


  • Film thickness
  • Imperfect interface
  • Layer
  • Visco-elastohydrodynamic lubrication

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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