Indentation load-displacement relations for the spherical indentation of elastic film/substrate structures

S. N.V.R.K. Kurapati, Y. C. Lu, F. Yang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The spherical indentation of elastic film /substrate structures is analyzed using the finite element method. The load-displacement curves of the film /substrate structures of various configurations are obtained and analyzed. A generalized power law relation is established, which can be used to analyze the load-displacement curve of elastic film /substrate systems under spherical indentations. The indentation load is dependent on the modulus ratio of the film to the substrate and film thickness. A semi-analytical expression for the power of the power law relation is also obtained as a function of the normalized film thickness and normalized film modulus, which can be used to determine the modulus of the film from a spherical indentation test.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalComputers, Materials and Continua
Volume20
Issue number1
StatePublished - 2010

Keywords

  • Finite element method
  • Nanoindentation
  • Thin film

ASJC Scopus subject areas

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

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