Adhesive contact of viscoelastic bodies is a challenging problem due to its rate-dependent nature. In this work, we formulate a theoretical model to describe the pulling process of a slightly wavy indenter from a soft medium, comparing predictions with numerical simulations. A cohesive approach is adopted to formulate the theory based on the assumption that viscoelastic dissipation is confined to a small region around the contact edge. The resulting increase in surface energy is related to the quasi-static work of adhesion through the creep compliance. Theoretical findings match quite good numerical results. However, when separation arises from complete contact, the pull-off force can be estimated only if a small flaw is postulated at the interface.

The adhesion of viscoelastic bodies with slightly wave surfaces

Afferrante L.
;
Violano G.
2022-01-01

Abstract

Adhesive contact of viscoelastic bodies is a challenging problem due to its rate-dependent nature. In this work, we formulate a theoretical model to describe the pulling process of a slightly wavy indenter from a soft medium, comparing predictions with numerical simulations. A cohesive approach is adopted to formulate the theory based on the assumption that viscoelastic dissipation is confined to a small region around the contact edge. The resulting increase in surface energy is related to the quasi-static work of adhesion through the creep compliance. Theoretical findings match quite good numerical results. However, when separation arises from complete contact, the pull-off force can be estimated only if a small flaw is postulated at the interface.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/245861
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact