Contact Behaviors of Coated Asperity with Power-Law Hardening Elastic-Plastic Substrate during Loading and Unloading Process

Xiqun Lu, Fuzhan Huang, Bin Zhao*, Leon M. Keer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The behavior of a coated asperity contacting with a rigid flat during the loading and unloading processes is investigated using the finite element method. The power-law hardening elastic-plastic substrate is considered, and the effect of the substrate hardening exponent and the coating thickness on the contact behavior is studied. It is shown that in the loading process, the contact load increases more slow and the contact area increases faster as the interference increases for smaller coating thickness and hardening exponent cases, and the coating thickness recovers more obviously after a rapid decrease. In the unloading process, the residual interference and the pileup effect of the asperity surface is larger for smaller coating thicknesses and hardening exponents, and the energy loss due to the plastic deformation is larger accordingly.

Original languageEnglish (US)
Article number1850034
JournalInternational Journal of Applied Mechanics
Volume10
Issue number3
DOIs
StatePublished - Apr 1 2018

Keywords

  • Loading and unloading
  • coatings
  • contact behavior
  • power-law hardening

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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