Vibration Characteristics of a Composite Beam Containing an Electrorheological Fluid

Abstract

The complex moduli of a composite consisting of a hollow beam filled with an electrorheological (ER) fluid were obtained by analyzing the beam's motion in free oscillation. The beam was considered to be a uniform viscoelastic material and was modeled as a damped harmonic oscillator. Hydrous-based ER fluids consisting of either cornstarch-corn oil or zeolite-silicone oil mixtures with varying amounts of solids and water content were employed, along with electric field intensities ranging from 0.0 to 1.7 × 10³ kV/m. Rheological data were also obtained for the fluids A linear correlation between the two components of the moduli and fluid strength was observed, which was ex plained in terms of fluid structure and particle polarization

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References

Duclos, T.G. , J.P. Coulter and L.R. Miller Smart Matenals, Structures, and Mathematical Issues, ARO workshop , Virgina Polytechnic Inst (September 15-16, 1988)

Gandhi, M.V. and B.S. Thompson Smart Materials, Structures, and Mathematical Issues, ARO workshop , Virgina Polytechnic Inst (September 15-16, 1988)

Coulter, J.P. and T.G. Duclos 2nd Inter Conf on Electrorheological Fluids, J D Carlson, A F Sprecher and H Conrad, eds , Technomic Publishing Co Inc., to be published (1990)

Block, H. and J.P. Kelly J App Phys , 21(21) 1661-1667 (1989)

Sprecher, A.F. , J.D. Carlson and H. Conrad Matenals Science and Engineering, 95 187-197 (1987)

Brooks, D.A. 2nd Inter Conf on Electrorheological Fluids, J D Carlson, A F Sprecher and H Conrad, eds , Technomic Publishing Co Inc , to be published (1990)

Petek, N.K. , R.J. Gougie and F.P. Boyle Passenger Car Meeting and Exposition, SAE Technical Paper Series, 881785 1-8 (1988)

Oppermann, G. , G. Penners , M. Schulze , G. Marquartdt , R. Flindt and T.H. Naumann 2nd Inter Conf on Electrorheological Fluids, J D Carlson, A F Sprecher and H Conrad, eds., Technomic Publishing Co Inc , to be published (1990)

Conrad, H. , Y. Chen and A.F. Sprecher 2nd Inter Conf on Electrorheological Fluids, J D Carlson, A F Sprecher and H Conrad, eds , Technomic Publishing Co Inc , in print (1989)

10.

Conrad, H. , A.R. Shamala and A.F. Sprecher Proc Ist Inter Svmp on Electrorheological Fluids, H Corand, A F Sprecher and J D Carlson, eds , North Carolina State Umv Engr Publication, p 47 (August 1989).

11.

Thomson, W.T. Theory of Vibration with Applications Englewood Cliffs, N J , Prentice-Hall, Inc (1981)

12.

Nielson, L.E. Mechanical Properties of Polymers and Composites New York, NY:Marcel Dekker Inc (1981)

13.

Sprecher, A.F. , Y. Chen and H. Conrad 2nd Inter Conf on Electrorheological Fluids, J D Carlson, A F Sprecher and H Conrad , eds , Technomic Publishing Co Inc , to be published (1990)