Spherical void expansion in rubber-like materials: The stabilizing effects of viscosity and inertia

Anshul Faye, J. A. Rodríguez-Martínez, K. Y. Volokh

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Dynamic cavitation is known to be a typical failure mechanism in rubber-like solids. While the mechanical behaviour of these materials is generally rate-dependent, the number of theoretical and numerical works addressing the problem of cavitation using nonlinear viscoelastic constitutive models is scarce. It has been only in recent years when some authors have suggested that cavitation in rubber-like materials is a dynamic fracture process strongly affected by the rate-dependent behaviour of the material because of the large strains and strain rates that develop near the cavity. In the present work we further investigate previous idea and perform finite element simulations to model the dynamic expansion of a spherical cavity embedded into a rubber-like ball and subjected to internal pressure. To describe the mechanical behaviour of the rubber-like material we have used an experimentally calibrated constitutive model which includes rate-dependent effects and material failure. The numerical results demonstrate that inertia and viscosity play a fundamental role in the cavitation process since they stabilize the material behaviour and thus delay failure.

Original languageEnglish
Pages (from-to)118-126
Number of pages9
JournalInternational Journal of Non-Linear Mechanics
Volume92
DOIs
StatePublished - 1 Jun 2017
Externally publishedYes

Keywords

  • Dynamic cavitation
  • Dynamic failure
  • Inertia
  • Rubber-like materials
  • Viscosity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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