Effective interfacial thickness in dissimilar materials through nanoindentation

S. S. Pulla, Y. C. Lu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The nanoindentation technique is used to quantify the interfaces between dissimilar materials. The interfaces can be generally referred as to the transition regions in polymers due to environmental aging, or the regions between fibers and polymer matrix in composites, or other similar situations. It is proposed to use a nanoindenter equipped with small spherical tip to cross-indent the interfaces of dissimilar materials. The nanoindentation tests were carried out through 3-dimensional finite element simulations with varying properties of the two dissimilar materials, including various combinations of modulus (E1/E2), yield strength (σy1/ σy2), hardening index (n1/n2), and the interface sizes (R/T). The mechanical properties are calculated across the interfaces and a quantitative model for predicting the effective interfacial thickness is established.

Original languageEnglish
Pages (from-to)263-278
Number of pages16
JournalComputers, Materials and Continua
Issue number3
StatePublished - 2012


  • Finite element method
  • Interfacial thickness
  • Nanoindentation

ASJC Scopus subject areas

  • Biomaterials
  • Modeling and Simulation
  • Mechanics of Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering


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