Elastic Constants and Internal Friction of Advanced Materials

  • Masahiko Hirao
  • Hirotsugu Ogi

Abstract

Resonant ultrasound spectroscopy (RUS) (Demarest, 1971; Ohno, 1976; Maynard, 1996; Migliori and Sarrao, 1997; Leisure and Willis, 1997) is recognized as a useful method to determine elastic constants of solids, including those with a lower crystallographic symmetry. The usual RUS configuration consists of a well-shaped specimen such as sphere, cylinder, or rectangular parallelepiped and two piezoelectric transducers that sandwich the specimen at opposite corners. The specimen dimensions are typically 1 to 10 mm. One transducer feeds a continuous-wave (CW) sinusoidal vibration and the other detects ultrasonic oscillation. Sweeping frequency, the received amplitude shows peaks at the free-vibration resonance frequencies of the specimen. The frequency response of the amplitude, or the resonance spectrum, thus includes many resonance peaks. The resonance frequencies are then used in an inverse calculation to find the set of elastic constants that give the measured resonance frequencies.

Keywords

Resonance Frequency Elastic Constant Internal Friction Vibration Group EMAR Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • Masahiko Hirao
    • 1
  • Hirotsugu Ogi
    • 1
  1. 1.Osaka UniversityJapan

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