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Measurement and Simulation of the Complex Shear Modulus of Insulators
Technical Paper
2004-01-2799
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
High frequency brake squeal is often suppressed by applying an insulator to the shoe plate of the pad. This may increase the damping and change the coupling conditions in a favorable way, but detailed knowledge about which of the several effects of insulators that are most important is not at hand. A joint effort is needed to increase the understanding of the effects of insulators. This paper describes a new way of measuring the shear stiffness and damping of insulators. The method can be used to measure either the individual layers in an insulator or the complete insulator that is build up of several layers.
The method does not rely on the resonant behavior of a structure and it therefore allows for measurements of the parameters over a wide frequency range. The measurement setup can be placed in a temperature chamber and this allows the parameters to be measured over a wide temperature range.
The parameters measured with this method can be used for numerical simulations with the purpose of investigating the effect of insulators in disc brakes. The measured parameters are verified by simulations of the response in a simple structure. Further measurements and simulations on brake components are included to illustrate the ability of the measured parameters to represent the properties of insulators in more complex structures.
A subsequent paper will deal with the ability of the derived insulator model to simulate the effects in a complete brake system.
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Authors
Citation
Flint, J., McDaniel, J., Li, X., Elvenkemper, A. et al., "Measurement and Simulation of the Complex Shear Modulus of Insulators," SAE Technical Paper 2004-01-2799, 2004, https://doi.org/10.4271/2004-01-2799.Also In
References
- Mignery L.A. Wang J. Luo J. Prediction of Damper Effects in a Brake System Model SAE paper 2001-01-3140
- Gade S. Zaveri K. Konstantin-Hansen H. Herlufsen H. Complex Modulus and Damping Measurements using Resonant and Non-resonant Methods Brüel and Kjær Technical Review No. 2 1994
- Flint J. A review of theories on constrained layer damping and some verification measurements on shim material SAE paper 2003-01-3321
- Reddy J.N. Mechanics of Laminated Composite Plates and Shells: Theory and Analysis Second Edition CRC Press New York 2003
- ABAQUS ABAQUS Analysis User's Manual ABAQUS 6.4 2003