Elastic interaction of spherical nanoinhomogeneities with GurtinMurdoch type interfaces

Volodymyr I. Kushch, Sofia G. Mogilevskaya, Henryk K. Stolarski, Steven L. Crouch

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

A complete solution has been obtained for the problem of multiple interacting spherical inhomogeneities with a GurtinMurdoch interface model that includes both surface tension and surface stiffness effects. For this purpose, a vectorial spherical harmonics-based analytical technique is developed. This technique enables solution of a wide class of elasticity problems in domains with spherical boundaries/interfaces and makes fulfilling the vectorial boundary or interface conditions a routine procedure. A general displacement solution of the single-inhomogeneity problem is sought in a form of a series of the vectorial solutions of the Lame equation. This solution is valid for any non-uniform far-field load and it has a closed form for polynomial loads. The superposition principle and re-expansion formulas for the vectorial solutions of the Lame equation extend this theory to problems involving multiple inhomogeneities. The developed semi-analytical technique precisely accounts for the interactions between the nanoinhomogeneities and constitutes an efficient computational tool for modeling nanocomposites. Numerical results demonstrate the accuracy and numerical efficiency of the approach and show the nature and extent to which the elastic interactions between the nanoinhomogeneities with interface stress affect the elastic fields around them.

Original languageEnglish (US)
Pages (from-to)1702-1716
Number of pages15
JournalJournal of the Mechanics and Physics of Solids
Volume59
Issue number9
DOIs
StatePublished - Sep 2011

Keywords

  • GurtinMurdoch model
  • Multipole expansion
  • Spherical inhomogeneity
  • Stress concentration
  • Vectorial surface harmonics

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