This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Squeal Noise Improvement by High Damping & High Stiffness under Layer Material
Technical Paper
2019-01-2111
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The purpose of this research is to clarify how damping characteristics of Under Layer (hereafter “UL”) material in the brake pads (hereafter “PAD”) influences brake squeal noise performance. In this study, UL material structure and dynamic viscoelasticity, for two different types of UL formulations are investigated. In addition, PAD damping ratio and squeal noise performance for multiple UL formulations are verified. As a result, the raw material orientation is determined based on manufacturing method, and it causes the UL material’s anisotropic properties. Dynamic viscoelasticity are dependent on the direction in which they are measured. In particular, the loss modulus, which is the damping element of dynamic viscoelasticity, is higher in the direction of the raw material orientation for the high damping and high stiffness UL formulation. In addition, it was confirmed that this loss modulus in the direction of the raw material orientation is effective for bending vibration. In the verification, the study focuses on the PAD damping ratio and squeal noise performance in the 1st bending vibration of the PAD. It is clarified that the PAD damping ratio increased as the loss modulus increases, which leads to improve squeal noise. In conclusion, this research proves that the high damping and high stiffness UL material is effective for squeal noise improvement.
Recommended Content
Technical Paper | In-Plane Vibration Investigations of a Noisy Twin Calliper Disc Brake |
Technical Paper | Study of Brake Squeal - Classification for Vibration Modes of Mounting Bracket |
Journal Article | A Study on Trigger of Disc Brake Squeal Generation |
Authors
Citation
Nishioka, M., Johnson, L., Rosalez, S., and Suzuki, S., "Squeal Noise Improvement by High Damping & High Stiffness under Layer Material," SAE Technical Paper 2019-01-2111, 2019, https://doi.org/10.4271/2019-01-2111.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Millner , N. An Analysis of Disc Brake Squeal SAE Technical Paper 780332 1978 10.4271/780332
- Nagasawa , Y. Analysis of Brake Squeal Technical Journal R&D Review of Toyota CRDL 1993
- Nishioka , M. , Hara , Y. , Nomoto , M. , and Ono , M. Brake Squeal After Standing at Low Temperatures SAE Technical Paper 2006-01-3190 2006 10.4271/2006-01-3190
- Kobayashi , M. and Odani , N. Study on Stabilization Friction Coefficient of Disc Brake Pads in Cold Condition SAE Technical Paper 973030 1997 10.4271/973030
- Matozo , L.T. , Menetrier , A. , and Tamagna , A. Analysis of High Damping Underlayer Materials for Brake Pads and Its Effects on NVH Performance SAE Technical Paper 2006-01-3223 2006 10.4271/2006-01-3223
- Dupac , M. and Biswas , C. A Study of Noise Reduction by Damping Layer Materials SAE Technical Paper 2007-01-3954 2007 10.4271/2007-01-3954
- Ferry , J.D. Viscoelastic Properties of Polymers New York Wiley 1980
- Yamaguchi , Y. and Kondo , T. Experimental Study of Disc In-Plane Mode which Induced Brake Squeal SAE Technical Paper 2017-01-2484 2017 10.4271/2017-01-2484
- Mallareddy , T.T. , Blaschke , P. , Schneider , S. , and Alarcón , D.J. Brake Impedance Test Stand - Modal Testing of Brake Pads under Pressureized Condition Using 3D SLDV and a Scalable Automatic Modal Hammer SAE Technical Paper 2017-01-2485 2017 10.4271/2017-01-2485
- Wegmann , E. and Stenkamp , A. Model Approach for a Load and Frequency Dependent Stiffness in Friction Materials SAE Technical Paper 2011-01-2352 2011 10.4271/2011-01-2352
- Kosaka , K. , Nishizawa , Y. , Kurita , Y. , and Oura , Y. Influence of PAD Surface Texture on Disc Brake Squeal SAE Technical Paper 2011-01-0034 2011 10.4271/2011-01-0034
- Kanehira , Y. , Aoki , Y. , and Nishizawa , Y. Evaluation of and Energy Dissipation Mechanism by Friction for Brake Shim SAE Technical Paper 2017-01-2487 2017 10.4271/2017-01-2487
- Triches , M. Jr. , Gerges , S.N.Y. , and Jordan , R. Reduction of Squeal Noise from Disc Brake Systems Using Constrained Layer Damping Journal of the Brazilian Society of Mechanical Sciences and Engineering 2004