Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-12T22:28:09.698Z Has data issue: false hasContentIssue false
  • English
  • Français

Extensional Effects in Constrained Viscoelastic Layer Damping

Published online by Cambridge University Press:  07 June 2016

B C Nakra  and
P Grootenhuis
B C Nakra
Affiliation:
Indian Institute of Technology, Delhi
P Grootenhuis
Affiliation:
Imperial College, London
Get access

Summary

The vibration damping in unsymmetrical, multi-layer beams is obtained by the combined effects of extensional and shear stresses in the viscoelastic layer. The shear stress distribution is not constant across such a layer, although previous work has ignored this. The error in an estimate based on the previous work of the overall loss factor can be large, in particular for the lower resonant modes of long beams with a stiff damping layer.

Type
Research Article
Information
Aeronautical Quarterly , Volume 25 , Issue 3 , August 1974 , pp. 225 - 231
Copyright
Copyright © Royal Aeronautical Society. 1974

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Grootenhuis, P, Damping mechanisms in structures and some applications of the latest techniques. Proceedings of the Symposium on the Applications of Experimental and Structural Dynamics, Institute of Sound and Vibration, Southampton University, April 1972.Google Scholar
2 Ross, D, Ungar, E E, Kerwin, E M, Damping of plate flexural vibrations by means of viscoelastic laminae. Structural Damping, American Society of Mechanical Engineers, Section 3, 1959.Google Scholar
3 Nakra, B C, Grootenhuis, P, Structural damping using a four-layer sandwich. Transactions of the American Society of Mechanical Engineers, Journal of Engineering for Industry, Vol 94, p 81, 1972.Google Scholar
4 Nakra, B C, Vibrations of viscoelastically damped laminated structures. PhD thesis, London University, 1966.Google Scholar
5 Jacobsen, L S, Ayre, R S, Engineering Vibrations, McGraw-Hill, p 489, 1958.Google Scholar
6 Nolle, A W, Methods for measuring dynamic mechanical properties of rubber-like materials. Journal of Applied Physics, Vol 19, p 753, 1948.Google Scholar
7 Ungar, E E, Hatch, D K, Selection guide to high damping materials. Product Engineering, Vol 32, p 44, 1961.Google Scholar
8 Cremer, L, Heckl, M, Structure-borne Sound, translated and revised by Ungar, E E,, Springer-Verlag, Berlin, 1973.CrossRefGoogle Scholar