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Title: Method and apparatus for measuring stress

Abstract

A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.

Inventors:
 [1]
  1. Ames, IA
Issue Date:
Research Org.:
Ames Lab., Ames, IA (United States); Iowa State University, Ames, IA (US)
OSTI Identifier:
865473
Patent Number(s):
4522071
Application Number:
06/518,243
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; measuring; stress; determining; material; independent; micro-structural; variations; anisotropies; comprises; comparing; velocities; horizontally; polarized; propagating; ultrasonic; shear; waves; interchanged; directions; propagation; polarization; carrying; periodic; permanent; magnet-electromagnetic; acoustic; transducers; generating; detecting; means; wave; ultrasonic shear; acoustic transducer; shear waves; shear wave; method comprises; permanent magnet; method comprise; acoustic transducers; electromagnetic acoustic; measuring stress; horizontally polarized; structural variations; /73/

Citation Formats

Thompson, R Bruce. Method and apparatus for measuring stress. United States: N. p., 1985. Web.
Thompson, R Bruce. Method and apparatus for measuring stress. United States.
Thompson, R Bruce. Tue . "Method and apparatus for measuring stress". United States. https://www.osti.gov/servlets/purl/865473.
@article{osti_865473,
title = {Method and apparatus for measuring stress},
author = {Thompson, R Bruce},
abstractNote = {A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {6}
}

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