Reflection and transmission characteristics of oblique-incidence ultrasonic waves at solid-solid contact interfaces

Taehyung Nam, Chungseok Kim, Taehun Lee, Kyung Young Jhang, Nohyu Kim

Research output: Contribution to journalArticle

Abstract

In order to evaluate the characteristics of solid-solid contact interfaces, reflection or transmission techniques involving normal-incidence longitudinal waves are generally used. However, these normal-incidence techniques are of limited use in field applications such as in the inspection of welded parts. The oblique-incidence ultrasonic technique may be an alternative for overcoming these problems. However, in this technique, the mode conversion at the contact interfaces should be taken into account along with the normal and tangential interface stiffness. In this study, we have suggested a theoretical model for obliqueincidence ultrasonic waves at the contact interfaces and analyzed their reflection and transmission characteristics. Experimental results showed that the measured reflection coefficient and second harmonic wave agreed well with the suggested theoretical model. Consequently, the oblique-incidence technique can be a promising method for evaluating the characteristics of the contact interfaces.

Original languageEnglish
Pages (from-to)1113-1118
Number of pages6
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume35
Issue number9
DOIs
StatePublished - 2011 Sep 1

Keywords

  • Contact interfaces
  • Normal/tangential interfacial stiffness
  • Oblique incidence ultrasonic wave
  • Ultrasonic reflection

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