Reduction of thermo-elastic damping with a secondary elastic field

S. Kumar, M. A. Haque

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Thermo-elastic damping is the dominant mode of energy loss due to the coupling of thermal and elastic fields in a body vibrating at or near resonant frequency. While the literature contains both exact and numerical schemes to quantify it, no technique is available yet to reduce thermo-elastic damping. We address this issue by introducing a secondary elastic field to derive an exact expression that predicts linear reduction in thermo-elastic damping with respect to frequency. Contrary to the current understanding, introduction of a static axial stress in addition to the flexural stresses is shown to increase quality factor and resonant frequency simultaneously.

Original languageEnglish (US)
Pages (from-to)423-427
Number of pages5
JournalJournal of Sound and Vibration
Volume318
Issue number3
DOIs
StatePublished - Dec 9 2008

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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