Film Elastic Properties Determined by the Indentation Test-Theoretical Considerations

Abstract

The elastic solutions of axisymmetric mixed boundary value problems are considered. An elastic layer is assumed to be either in smooth contact or perfectly bonded to a semi-infinite elastic half-space. The elastic field caused by the indentation of the elastic layer by a rigid indenter is solved for spherical, conical, and flat-ended-cylindrical indenters. The results are obtained by solving a Fredholm integral equation of the second kind with a continuous symmetrical kernel that depends on the bonding conditions. Numerical results are given for several combinations of film and substrate elastic moduli and film thicknesses. These results provide a guideline for selecting appropriate film thickness and substrates to determine the elastic constants of thin films.

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Document Details

Document Type
Technical Report
Publication Date
Jan 12, 1989
Accession Number
ADA203997

Entities

People

  • B. B. Rath
  • H. Y. Yu
  • S. C. Sanday

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Boundary Value Problems
  • Ceramic Matrix Composites
  • Composite Materials
  • Computers
  • Elastic Properties
  • Equations
  • Films
  • Integral Equations
  • Materials
  • Materials Science
  • Mechanical Properties
  • Modulus Of Elasticity
  • Plastic Properties
  • Security
  • Shear Modulus
  • Stiffness
  • Thin Films

Fields of Study

  • Mathematics

Readers

  • Fluid Dynamics.
  • Materials Science (Mechanical Engineering).
  • Thin Film Deposition Science.

Technology Areas

  • Space