Determination of interphase properties of fiber composites from phase velocities of ultrasound

M. Gosz*, J. D. Achenbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Average values of the in situ mechanical properties of the interphases in an unidirectional fiber-reinforced composite were deduced from measured values of the phase velocities of ultrasonic signals. The composite was modeled by a hexagonal array of fibers in a matrix, and the interphases are represented by a spring-layer model. For deformation in planes normal to the fiber direction there are two unknown interphase parameters. For known values of the mechanical and geometrical properties of the fibers, the matrix, and the interphases, the effective elastic constants were obtained by finite element calculations in a representative cell. When the interphase parameters were unknown, the finite element procedure was measured in an iterative mode to obtain the interphase parameters by systematic comparison between calculated and measured values of the effective elastic constants of the composite.

Original languageEnglish (US)
Pages (from-to)193-197
Number of pages5
JournalMaterials Science and Engineering A
Issue number1-2
StatePublished - Apr 30 1993

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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