STUDY OF ULTRASONIC METHODS FOR NONDESTRUCTIVE MEASUREMENT OF RESIDUAL STRESS, PART 2

Abstract

The study of stress-induced birefringence was continued in both polycrystalline and single crystal experiments.. The effect is explained on the basis of nonliner elasticity theory. Experiments indicate that dislocation activity does not strongly affect results in polycrystalline specimens, however a pronounced influence may be observed in single crystals. Nonlinear elasticity theory was used to investigate the interaction of two intersecting, plane, elastic waves in a homogeneous, isotropic medium. A criterion for the occurrence of a strong scattered wave was derived and as formulated as a relationship between the second order elastic constants of the material, and the angle between the intersecting wave vectors and the ratio of primary wave frequencies.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1963
Accession Number
AD0299017

Entities

People

  • Donald R. Kobett
  • Fred R. Rollins Jr.
  • Jerry Lee Jones

Organizations

  • MRIGlobal

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Birefringence
  • Crystal Structure
  • Detection
  • Difference Frequency
  • Elastic Properties
  • Elastic Waves
  • Equations
  • Equations Of Motion
  • Measurement
  • Plastic Explosives
  • Residual Stress
  • Scattering
  • Secondary Waves
  • Single Crystals
  • Transverse Waves
  • Ultrasounds
  • Wave Propagation

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.