Damping treatments can be employed to mitigate vibration levels of structures near a specific resonance frequency. In the automotive area, constrained-layer dampers are the most employed, consisting on a viscoelastic layer bonded to a metallic-restrictor layer and to the structure itself subsequently. The damper’s frequency performance is strongly dependent upon the temperature of operation, which means that there is a need to characterize this relation in order to choose the best damping material, thus optimizing the application. In this paper, a laboratory test procedure known as the Oberst Beam Method was employed to characterize the frequency and temperature behavior of a commonly used damper. The test, which involves the Frequency Response Function measurement of a system composed by the damper applied to a standardized beam, followed a SAE procedure. An auxiliary CAE model was also developed and compared to physical test results. As conclusion, modifications were proposed in order to improve results confidence and the applicability of the standard test in a laboratory environment.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Exploring Oberst Beam Standard Method for Viscoelastic Materials to Increase Test Confidence and Applicability


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    26th SAE BRASIL Inernational Congress and Display ; 2017



    Publication date :

    2017-11-07




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Identification of Nonlinear Viscoelastic Parameters Based on an Enhanced Oberst Beam Method

    Jaboviste, Kévin / Reboul, Emeline Sadoulet / Peyret, Nicolas et al. | British Library Conference Proceedings | 2018


    The estimation of damping material loss factor in the Oberst beam test

    Mina,L. / Liang,L.G. / Garibaldi,L. et al. | Automotive engineering | 1992


    Development and Validation of Numerical Model for Standardized Oberst Beam Test (ASTM E 756-98)

    Takemori, Celso Kenzo / Baars, Edmar / de Carvalho Moura, Frederico Luiz et al. | SAE Technical Papers | 2014



    Comparison of Long Bar Test Method to Oberst Bar Test Method for Damping Material Evaluation

    Yoo, Taewook / Gerdes, Ronald W. / Lee, Seungkyu et al. | British Library Conference Proceedings | 2017