Choice of thickness ratio of a coated beam used for investigating the complex modulus of viscoelastic materials

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The coated beam method has been widely used for investigating the complex modulus of elasticity of relatively soft viscoelastic materials; e.g., materials for vibration damping. With this method a rectangular section metal beam is coated with the viscoelastic material on one side, or symmetrically on both sides, and the resonances of the bending vibration of the beam are investigated. In this paper a procedure is described for finding the ratio of coating thickness to metal thickness required to obtain accurate results for the complex modulus in such investigations. The contradiction experienced earlier-that a relatively large thickness ratio is required for precision while the nature of the resonance method is such as to demand a small one-is analyzed mathematically. The relationships derived serve as a basis for optimizing the choice of the ratio. Diagrams and a procedure for this are worked out and presented. Finally, a few experimental results obtained with suitable and unsuitable thickness ratios are discussed.

Original languageEnglish
Pages (from-to)155-164
Number of pages10
JournalJournal of Sound and Vibration
Volume66
Issue number2
DOIs
Publication statusPublished - Sep 22 1979

Fingerprint

thickness ratio
Vibrations (mechanical)
vibration damping
bending vibration
Metals
metals
modulus of elasticity
Damping
Elastic moduli
diagrams
coatings
Coatings

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

Cite this

Choice of thickness ratio of a coated beam used for investigating the complex modulus of viscoelastic materials. / Pritz, T.

In: Journal of Sound and Vibration, Vol. 66, No. 2, 22.09.1979, p. 155-164.

Research output: Contribution to journalArticle

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