Estimation of elastic constants from surface acoustic wave velocity by inverse analysis using the downhill simplex method

Harumichi Sato, Hideo Nishino, Hideo Cho, Hisato Ogiso, Kazushi Yamanaka

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The measurement of surface acoustic wave (SAW) velocity is used to estimate the surface properties because the velocity depends on the elastic properties near the surface. To estimate the elastic constants, we developed a new inverse method combining the Monte Carlo method and the downhill simplex method. The initial values are determined using many random numbers, instead of an arbitrarily chosen several sets of values, in order to reduce the risk of trapping by the local pseudo minima. We confirm that the estimated elastic constants agree well with the reported elastic constants of Si and the experimental SAW velocity is quite well reproduced. We estimate the elastic constants of quartz for application purposes.

Original languageEnglish
Pages (from-to)3116-3119
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume37
Issue number5 B
DOIs
Publication statusPublished - 1998

Keywords

  • Elastic constant
  • Inverse analysis
  • Laser-generated ultrasound
  • Nondestructive evaluation
  • Phase velocity scanning method
  • Scanning interference fringes
  • Surface acoustic waves

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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