Sage Journals: Discover world-class research

Abstract

This paper considers two aspects for enhancing structural damping using passive, but novel, methods. Attempting to take a forward look to the twenty-first century, the concept of using biological and evolutionary methods to ‘grow’ damping material on the surface of a vibrating component is described. A simple cantilever beam is used as the component and a ‘free-layer’ viscoelastic damping treatment is ‘grown’ on the structure in such a way as to provide optimum damping over a frequency bandwidth that encompasses flexural and torsional modes of vibration. To enhance the ‘controllability’ of the damping, the viscoelastic material is considered as a cellular material displaying a negative Poisson's ratio and it is shown that for the ‘free-layer’ treatment it is possible to produce a range of modal loss factors by changing the cell geometry. Only numerical studies are used and no experimental validation has been carried out, the idea being to stimulate ideas for future structural damping concepts.

Keywords

auxetic materials cellular materials negative Poisson's ratio biomimetics structural damping viscoelastic materials

Get full access to this article

View all access options for this article.

References

Tomlinson

G. R.

Bullough

W. A.

(Eds) In Proceedings of 4th European and 2nd MIMR Conference on Smart Materials and Structures, Harrogate, 1998 (IoP, Bristol).

Wereley

N. M.

Tomlinson

G. R.

(Eds) Special issue of passive and active damping technologies. Smart Mater. and Struct., 1996, 5(5).

Nashif

A. D.

Jones

D. I. G.

Henderson

J. P.

Vibration Damping, 1995 (John Wiley).

Cowin

C. C.

Bone stress adaptation models. J. Biomech. Engng, 1993, 115, 528–533.

Wardle

Tomlinson

G. R.

A novel approach to structural design using biological models. In Proceedings of 21st ISMA International Conference on Noise and Vibration, Leuven, 1996, Vol. 3, pp. 1817–1826.

Xie

Y. M.

Steven

G. P.

Evolutionary structural optimisation for dynamics problems. Comput. and Struct., 1996, 58 (6), 1067–1073.

Tschoegl

N. W.

The Phenomenological Theory of Linear Viscoelastic Behaviour, 1989 (Springer-Verlag).

Worden

Tomlinson

G. R.

On structures from cellular automata. In Proceedings of International Symposium on Microsystems, Intelligent Materials and Robots, Sendai, Japan, 1995, pp. 390–394.

Evans

K. E.

Microstructural modelling of auxetic microporous polymers. J. Mater. Sci., 1995, 30, 3319–3332.

10.

Gibson

L. J.

Ashby

M. F.

Cellular Solids: Structures and Properties, 2nd edition, 1997 (Cambridge University Press).

11.

Anderson

K. L.

Evans

K. E.

Polym. Engng, 1992, 33(20), 4435–4438.

12.

Warren

W. E.

Kraynik

A. M.

Foam mechanics. Mechanics Mater., 1987, 6, 27–31.

13.

Cremer

Heckl

Ungar

E. E.

Structure-Borne Sound, 1973 (Springer-Verlag, New York).

Structural damping enhancement using a novel approach—a forward look

Abstract

Abstract

Keywords

Get full access to this article

References