This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Determination of Viscoelastic Core Material Properties Using Sandwich Beam Theory and Modal Experiments
Technical Paper
1999-01-1677
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Damping material for automotive structures is often quantified in terms of composite loss factor or damping ratio by using ASTM/SAE beam or modal tests. Simplified expressions have also been used to estimate certain material properties. However, none of these tests provide any information on the properties of viscoelastic core material such as rubber or adhesive in practical structures. To overcome this deficiency, a refined estimation procedure is proposed. A new sandwich beam model has been developed which describes all layers of an arbitrarily applied damping patch. By using both analytical predictions and modal experiments on a cantilever beam, spectrally-varying loss factor and shear modulus of the unknown core are determined.
Recommended Content
Citation
Kung, S. and Singh, R., "Determination of Viscoelastic Core Material Properties Using Sandwich Beam Theory and Modal Experiments," SAE Technical Paper 1999-01-1677, 1999, https://doi.org/10.4271/1999-01-1677.Also In
References
- Singh, R. Kung, S.-W. Sheikh, A. Mitchell, M. Nandi, U. Ransdell, M. Evaluation of Damping Material at Higher Frequencies with Application to Automotive Systems Including Brakes SAE Paper # 951243
- ASTM Standard E756-83 Standard Method for Measuring Vibration-Damping Properties of Materials 1983
- Nashif, A. D. Jones, D. I. G. Henderson, J. P. Vibration Damping John Wiley 1985
- Sun C. T. Lu, Y. P. Vibration Damping of Structural Elements . Prentice Hall 1995
- Ross, D. Kerwin Jr., E. M. Ungar, E. E. Damping of Plate Flexural Vibrations by Means of Viscoelastic Laminae, Structural Damping. ASME 49 87 1959
- Rao, D. K. Frequency and Loss Factors of Sandwich Beams Under Various Boundary Conditions Journal of Mechanical Engineering Science 20 271 282 1978
- Lall, A. K. Asnani, N. T. Nakra, B. C. Damping Analysis of Partially Covered Sandwich Beams, Journal of Sound and Vibration 123 247 259 1988
- Kung S.-W. Singh, R. Vibration Analysis of Beams with Multiple Constrained Layer Damping Patches Journal of Sound and Vibration 212 781 805 1997
- Singh, R. Liaw, M. L. Farstad, J. E. Kung, S.-W. Determination of Joint Stiffness Through Vibration Analysis of Beam Assemblies ASME Paper # 95-WA/NCA-28 1995
- Vinayak H. Singh, R. Eigensolutions of Annular-Like Elastic Disks with Intentionally Removed or Added Material Journal of Sound and Vibration 192 741 769 1996
- Lin R. M. Lim, M. K. Complex Eigen-sensitivity-Based Characterization of Structures with Viscoelastic damping Journal of the Acoustical Society of America 100 3182 3191 1996
- Rikards, R. Chate A. Barkanov, E. Finite Element Analysis of Damping the Vibration of Laminated Composites Computer and Structures 47 1005 1015 1993