ULTRASONIC COUPLING LOSSES

Abstract

Coupling losses must be considered in ultrasonic measurements of small specimens of high Q materials. In these measurements, the energy loss in the bonding material is often of the same magnitude or larger than the loss in the specimen. This study is an investigation of the characteristics of coupling losses. The energy losses due to a coupling film or coupling by placing surfaces in optical contact were measured as a function of such varied parameters as frequency, bond thickness, bond composition, mechanical loading, surface conditions, relative alignment of transducer and specimen, and temperature.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1967
Accession Number
AD0683304

Entities

People

  • W. L. Ghering

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Properties
  • Acoustics
  • Crystal Lattices
  • Crystal Structure
  • Finishes
  • Frequency
  • Frequency Shift
  • Materials
  • Measurement
  • Near Field
  • Piezoelectric Crystals
  • Resonant Frequency
  • Secondary Waves
  • Surface Properties
  • Surface Tension
  • Thin Films

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Microwave Engineering.