This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Testing and Characterization of Elastomeric Bushings for Large Deflection Behavior
Annotation ability available
Sector:
Language:
English
Abstract
Elastomeric components are used extensively in the construction of the modern automobile to accommodate relative movement between metal parts, absorb shocks and to provide isolation from undesirable vibrations. Their small-amplitude dynamic stiffness and damping characteristics are the key mechanical properties most influencing vehicle NVH performance. Their large-amplitude static force-deflection characteristics are crucial for vehicle ride and handling performance. On the other hand, when a vehicle is driven on a rough road durability course at a proving ground, all elastomeric components experience large-amplitude dynamic loads. The durability loads transferred through each elastomeric component highly depend on the stiffness and damping characteristics of these components. Although a large amount of small-amplitude dynamic stiffness and damping data and large-amplitude static force deflection data are available for various vehicle elastomeric components in the industry, relatively limited information is available for large-amplitude dynamic stiffness and damping values.
In the current paper, large-deflection static and dynamic tests are conducted on five different types of elastomeric components from a production vehicle. The tests include static, force-relaxation, harmonic and transient impact loads. Most importantly, the amplitudes used in the tests reflect the ones that these elastomeric components actually experience in a vehicle durability test. The purpose of the study is to develop a good understanding of the mechanical behavior of typical vehicle elastomeric components in the operating range of a durability test. The generic stiffness and damping characteristics are presented which can be used as a guideline in elastomeric component modeling and in vehicle durability design.
Recommended Content
Authors
Topic
Citation
Kuo, E., "Testing and Characterization of Elastomeric Bushings for Large Deflection Behavior," SAE Technical Paper 970099, 1997, https://doi.org/10.4271/970099.Also In
References
- Cardillo, R. M. “Dynamic Testing of Elastomer Mountings,” Journal of Applied Polymer Science 8 53 71 1964
- Harris, J. Stevenson, A. “On the Role of Nonlinearity in the Dynamic Behavior of Rubber Components,” Rubber Chemistry and Technology 59 740 764 1986
- Mulling, L. “Softening of Rubber by Deformation,” Rubber Chemistry and Technology 42 339 362 1969
- Bauer, R. F. Crossland, A. H. “The Resolution of Elastomer Blend Properties by Stress-Strain Modeling - An Extension of the Model to Carbon-Black-loaded Elastomers,” Rubber Chemistry and Technology 63 5 779 791 1990
- Govindjee, S. Simo, J. C. “A Micro-Mechanically Based Continuum Damage Model for Carbon Black-Filled Rubbers Incorporating Mullins' Effect,” J. Mechanics and Physics of Solids 39 87 112 1991
- Govindjee, S. Simo, J. C. “Transition from Micro-Mechanics to Computationally Efficient Phenomenology: Carbon Black-Filled Rubber Incorporating Mullins' Effect,” J. Mechanics and Physics of Solids 40 213 233 1992