Viscoelastic-adhesive contact modeling: Application to the characterization of the viscoelastic behavior of materials

Hualong Yu*, Zhe Li, Q Jane Wang

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

In contacts involving viscoelastic materials, both the time-dependent modulus of the material and the adhesive interaction between contact surfaces play important roles. This work aims to derive viscoelastic-adhesive contact models for realistic contact analyses and develop a model-based-empirical method to determine localized properties (such as the time dependent creep compliance function) of a viscoelastic material considering surface adhesion and utilizing data from contact creep tests. The reported work is based on the viscoelastic fracture mechanics theory by Schapery (Schapery, 1989) and elastic contact mechanics models (Maugis, 1992; Johnson et al., 1971; Derjaguin et al., 1975). The Particle Swarm Optimization method (Kennedy and Eberhart, 1995) is utilized to find solutions to the nonlinear equations of this model. Contact creep tests of PDMS samples were designed and performed to validate the model. A multiple-decade power-law creep compliance function was obtained for a group of PDMS samples. The results show that the obtained creep compliance is a function of crosslink density of PDMS, independent of indenter tip size and the applied load.

Original languageEnglish (US)
Pages (from-to)55-65
Number of pages11
JournalMechanics of Materials
Volume60
DOIs
StatePublished - Feb 25 2013

Keywords

  • Adhesive contact
  • Surface creep
  • Viscoelastic materials

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Mechanics of Materials

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