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Title: Resonant nonlinear ultrasound spectroscopy

Patent ·
OSTI ID:874168
 [1];  [2];  [3]
  1. Santa Fe, NM
  2. Los Alamos, NM
  3. Amherst, MA
+ Show Author Affiliations

Components with defects are identified from the response to strains applied at acoustic and ultrasound frequencies. The relative resonance frequency shift .vertline..DELTA..function./.function..sub.0.vertline., is determined as a function of applied strain amplitude for an acceptable component, where .function..sub.0 is the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak of a selected mode to determine a reference relationship. Then, the relative resonance frequency shift .vertline..DELTA..function./.function..sub.0 is determined as a function of applied strain for a component under test, where fo .function..sub.0 the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak to determine a quality test relationship. The reference relationship is compared with the quality test relationship to determine the presence of defects in the component under test.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
DOE Contract Number:
W-7405-ENG-36
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Number(s):
US 6330827
OSTI ID:
874168
Country of Publication:
United States
Language:
English

References (3)

Influence of change in physical state on elastic nonlinear response in rock: Significance of effective pressure and water saturation
  • Zinszner, Bernard; Johnson, Paul A.; Rasolofosaon, Patrick N. J.
  • Journal of Geophysical Research: Solid Earth, Vol. 102, Issue B4 https://doi.org/10.1029/96JB03225
journal April 1997
Manifestation of nonlinear elasticity in rock: convincing evidence over large frequency and strain intervals from laboratory studies journal January 1996
Resonance and elastic nonlinear phenomena in rock
  • Johnson, Paul A.; Zinszner, Bernard; Rasolofosaon, Patrick N. J.
  • Journal of Geophysical Research: Solid Earth, Vol. 101, Issue B5 https://doi.org/10.1029/96JB00647
journal May 1996

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Related Subjects

resonant
nonlinear
ultrasound
spectroscopy
components
defects
identified
response
strains
applied
acoustic
frequencies
resonance
frequency
shift
vertlinedeltafunctionfunctionsub0vertline
determined
function
strain
amplitude
acceptable
component
functionsub0
peak
lowest
deltafunction
selected
mode
determine
reference
relationship
vertlinedeltafunctionfunctionsub0
quality
compared
presence
resonance frequency
frequency shift
ultrasound spectroscopy
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