This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Equivalent Material Properties of Multi-Layer, Lightweight, High-Performance Damping Material and Its Performance in Applications
Technical Paper
2019-01-1573
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
In this study, we investigated two aspects of a multi-layer, lightweight damping treatment. The first aspect studied was an equivalent material property estimate for a simplified finite element (FE) model. The simplified model is needed for computational efficiency, i.e. so that Tier 1 and OEM users can represent this complex, multi-layer treatment as a single, isotropic solid layer plus an aluminum constraining layer. Therefore, the use of this simplified FE model allows the multilayer treatment to be included in large body-in-white structural models. An equivalent material property was identified by first representing three unique layers (two adhesive layers plus a connecting standoff layer) by a single row of isotropic solid elements, then an optimization tool was used to determine the “best fit” for two properties including Young’s modulus and material loss factor. Equivalent properties were validated for various substrate thickness and coverage areas heights by comparison to center-driven long bar test results.
Secondly, the effect of damping treatment size was studied using the previously identified equivalent material properties. This was a damper placement study to determine if a smaller, higher performing damping patch can perform as well as a larger, lower performing patch. The multi-layer damping material produces high system loss factors and it was therefore expected to perform similarly to a larger, lower performing treatment. The study showed that there is a geometry dependency for performance and also showed that performance does not strictly scale with material loss factor and treatment area. It is possible that two different treatments will produce similar damping - one with high material loss factor, small treatment area and the other with lower material loss factor and a larger area. However, achieving good results with a smaller treatment area requires knowledge of the structural modes and proper placement of the treatment.
Recommended Content
Authors
Citation
Yoo, T., Eichhorn, G., Gerdes, R., Lee, S. et al., "Equivalent Material Properties of Multi-Layer, Lightweight, High-Performance Damping Material and Its Performance in Applications," SAE Technical Paper 2019-01-1573, 2019, https://doi.org/10.4271/2019-01-1573.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 | ||
Unnamed Dataset 6 |
Also In
References
- Yoo , 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 10.4271/2017-01-1851
- Lee , S. , Yoo , T. , Gerdes , R.W. , Hanschen , T.P. et al. Lightweight, Flexible Damping Treatment Using a Kinetic Spacer Inter-Noise 2018 USA Aug. 26-29 2018
- Nashif , A.D. , Jones , D.I.G. , and Henderson , J.P. Vibration Damping New York John Wiley & Sons 1985 0-471-86772-1
- Grellman , G. and Seidler , S. Polymer testing Munich Hanser Publications 2007 978-1569904107
- Stanley , D.R. Alternative Method of Measuring System Loss Factor Noise-Con 2014 USA September 8-10 2014
- Dowling , J.M. and Saha , P. A Correlation between Oberst Bar and Center Point Damping Results SAE Technical Paper 2009-01-2134 2009 10.4271/2009-01-2134