The Effect of Stress Fields on the Ultrasonic Energy Reflected from Discontinuities in Solids

Abstract

The challenge to the field of nondestructive testing (NDT) is to develop procedures capable of resolving defects of critical size and to accurately define defect geometry. The NDT research program now in progress under the contract is a modification of the ultrasonic pulse-echo method of flaw detection. The approach is based on the principal that when a stress field is applied to a discontinuity (defect or flaw) in a solid, a change in the geometry of the discontinuity is effected. The change in geometry can result in corresponding changes in amplitude and/or pattern of ultrasonic energy reflected from the discontinuity. It is reasonable to expect that the reflected energy response should be relatable to specific distinguishing features of a given type of discontinuity.

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Document Details

Document Type
Technical Report
Publication Date
Jan 28, 1971
Accession Number
AD0719434

Entities

People

  • John G. Sessler
  • Leland Barrus
  • Mukul Sengupta
  • Volker Weiss

Organizations

  • SRC Inc.

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustic Waves
  • Air Gaps
  • Aluminum
  • Aluminum Alloys
  • Amplitude
  • Chemical Engineering
  • Crack Tips
  • Discontinuities
  • Frequency
  • Geometry
  • Materials
  • Materials Science
  • Mechanics
  • Shape
  • Stresses
  • Tensile Stress

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Systems Analysis and Design