Method for resonant measurement

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870324

Rhodes, George W ^[1]; Migliori, Albert ^[2]; Dixon, Raymond D ^[3]

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1. 5201 Rio Grande Blvd., N.W., Albuquerque, NM 87107
2. Rte. 4, Box 258 Tano Rd., Sante Fe, NM 87501
3. 396 Connie Ave., White Rock, NM 87544

A method of measurement of objects to determine object flaws, Poisson's ratio (.sigma.) and shear modulus (.mu.) is shown and described. First, the frequency for expected degenerate responses is determined for one or more input frequencies and then splitting of degenerate resonant modes are observed to identify the presence of flaws in the object. Poisson's ratio and the shear modulus can be determined by identification of resonances dependent only on the shear modulus, and then using that shear modulus to find Poisson's ratio using other modes dependent on both the shear modulus and Poisson's ratio.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Rhodes, George W. (5201 Rio Grande Blvd., N.W., Albuquerque, NM 87107);Migliori, Albert (Rte. 4, Box 258 Tano Rd., Sante Fe, NM 87501);Dixon, Raymond D. (396 Connie Ave., White Rock, NM 87544)
• Patent Number(s): US 5495763
• OSTI ID: 870324
• Country of Publication: United States
• Language: English

Related Subjects

method
resonant
measurement
determine
flaws
poisson
ratio
sigma
shear
modulus
shown
described
frequency
expected
degenerate
responses
determined
input
frequencies
splitting
modes
observed
identify
presence
identification
resonances
dependent
shear modulus
resonant mode
/73/