Journal of Mechanical Design and Vibration
ISSN (Print): 2376-9564 ISSN (Online): 2376-9572 Website: Editor-in-chief: Shravan H. Gawande
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Journal of Mechanical Design and Vibration. 2013, 1(1), 5-9
DOI: 10.12691/jmdv-1-1-2
Open AccessReview Article

A Review of Automotive Brake Squeal Mechanisms

Nouby M. Ghazaly1, , Mohamed El-Sharkawy1 and Ibrahim Ahmed2

1Automotive and Tractor Eng. Dept., College of Engineering, Minia University, El-Minia, Egypt

2Department of Automotive Technology, Faculty of Industrial Education, Helwan University, Cairo, Egypt

Pub. Date: January 24, 2014

Cite this paper:
Nouby M. Ghazaly, Mohamed El-Sharkawy and Ibrahim Ahmed. A Review of Automotive Brake Squeal Mechanisms. Journal of Mechanical Design and Vibration. 2013; 1(1):5-9. doi: 10.12691/jmdv-1-1-2


In the last few decades, a considerable amount of research has been done by many researchers around the world on the possibility of understanding mechanisms of brake squeal noise in order to improve vehicle users’ comfort and reduce the overall environmental noise level. Despite these efforts, still no general solution exists. Therefore, it is one of the most significant issues that require a detailed and in-depth study for realizing mechanisms of squeal generation in order to design silent brakes. The aim of this review paper is to gain insight into the disc brake squeal mechanisms that lead to audible noise. The principal mechanisms will be introduced to explain the brake squeal phenomenon namely; stick-slip, sprag-slip, modal coupling and hammering excitation mechanism. As more experimental evidence and simulation results become available, it is found that none of the above mechanisms alone can explain all events related to the squeal noise.

brake squeal stick-slip sprag-slip modal coupling hammering excitation mechanism

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