One-dimensional wave propagation in a functionally graded elastic medium

T. C. Chiu, F. Erdogan

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

In this study the one-dimensional wave propagation in a functionally graded elastic slab is considered. It is assumed that the stiffness and density of the medium vary continuously in thickness direction and it is initially at rest and stress-free. The slab is subjected to a pressure pulse on one surface and a vanishing stress or displacement condition on the other. The solution is obtained in wave summation form. Propagation of a rectangular pressure pulse in a graded medium that consists of either nickel/zirconia or aluminum/silicon carbide is studied as examples. It is shown that there is considerable wave distortion in time and the distortion is much more pronounced in slabs with fixed/free boundary conditions. A simple approximate expression giving the peak stress is developed. Also it is demonstrated that the energy balance principle may be used as a convergence criterion in the calculation of stresses.

Original languageEnglish
Pages (from-to)453-487
Number of pages35
JournalJournal of Sound and Vibration
Volume222
Issue number3
DOIs
Publication statusPublished - 1999 May 6

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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