Ultrasonic Methods to Study Shadow Boundaries of Diffracting Cracks. Ultrasonic Caustics in NDE (Non-Destructive Evaluation).

Abstract

The formation of caustics due to the defraction of ultrasound is predicted theoretically and observed experimentally in the shadow region of elliptical discontinuities in material. Good agreement is obtained between experiment and theory. It is suggested to use this method to determine size and orientation of cracks in structural materials, which is an important problem in non-destructive evaluation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1984
Accession Number
ADA138839

Entities

People

  • L. Adler

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Acoustics
  • Air Gaps
  • Boundaries
  • Composite Structures
  • Department Of Defense
  • Diffraction
  • Elastic Waves
  • Engineering
  • Far Field
  • Forward Scattering
  • Geometry
  • Materials
  • Orientation (Direction)
  • Physics
  • Scattering
  • Test And Evaluation
  • Ultrasounds

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Wave Propagation and Nonlinear Chaotic Dynamics.