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Comparison of Long Bar Test Method to Oberst Bar Test Method for Damping Material Evaluation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 05, 2017 by SAE International in United States
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Several methods for evaluating damping material performance are commonly used, such as Oberst beam test, power injection method and the long bar test. Among these test methods, the Oberst beam test method has been widely used in the automotive industry and elsewhere as a standard method, allowing for slight bar dimension differences. However, questions have arisen as to whether Oberst test results reflect real applications. Therefore, the long bar test method has been introduced and used in the aerospace industry for some time. In addition to the larger size bar in the long bar test, there are a few differences between Oberst (cantilever) and long bar test (center-driven) methods. In this paper, the differences between Oberst and long bar test methods were explored both experimentally and numerically using finite element analysis plus an analytical method. Furthermore, guidelines for a long bar test method are provided.
CitationYoo, T., Gerdes, R., Lee, S., Stanley, D. et al., "Comparison of Long Bar Test Method to Oberst Bar Test Method for Damping Material Evaluation," SAE Technical Paper 2017-01-1851, 2017, https://doi.org/10.4271/2017-01-1851.
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- Stanley, D.R., “Alternative method of measuring system loss factor,” presented at Noise-Con 2014, USA, September 8-10, 2014.
- Dowling, J. and Saha, P., "A Correlation between Oberst Bar and Center Point Damping Results," SAE Technical Paper 2009-01-2134, 2009, doi:10.4271/2009-01-2134.
- Nashif, A. D., Jones, D. I. G., and Henderson, J. P., “Vibration Damping”, (New York, John Wiley & Sons, 1985), ISBN 0-471-86772-1.
- Vér I.L. and Beranek L.L., “Noise and Vibration Control Engineering,” pp.579-609, (New York, John Wiley & Sons, 2006), ISBN 978-81-265-4680-0.
- SAE International Surface Vehicle Recommended Practice, “Laboratory Measurement of the Composite Vibration Damping Properties of Material on a Supporting Steel Bar,” SAE Standard J1637, Rev. Aug. 2007.
- ASTM E765-05(2010), “Standard Test Method for Measuring Vibration-Damping Properties of Materials,” ASTM International, West Conshohocken, PA, 2010.
- Grellman, G., Seidler, S., “Polymer testing”, (Munich, Hanser Publications, 2007), ISBN 978-1569904107