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A Study of Frictional Contact Vibration Influence on Hot Spot in Automotive Disk Brake  

Cho, Ho-Joon (Mechanical Engineering, Inha University)
Kim, Myoung-Gu (Mechanical Engineering, Inha University)
Cho, Chong-Du (Mechanical Engineering, Inha University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.15, no.1, 2007 , pp. 154-161 More about this Journal
Abstract
Hot spot phenomenon that occurs, during judder vibration, is locally concentrated heat due to friction between brake disk and pad. It is important to understand the reason behind hot spot phenomenon, for reduction of judder vibration. In this experimental study, experiments were performed in accordance with rotation speed of brake disk, pressure of master cylinder and pad length for achieving different aspects of hot spot phenomenon. Temperature distribution of hot spot was obtained by using the infrared camera. As the hot spot occurred, vibration was measured and frequency analysis was performed. Finite element analysis of thermal deformation of disk was performed by using temperature distribution that was achieved by experimental results. And mode shapes of disk was analyzed by finite element analysis and compared with experimental results. It was observed that the excitation frequency band of frictional contact and frictional force mainly affects the hot spot phenomenon.
Keywords
Hot spot phenomenon; Judder vibration; Frequency analysis; Thermal deformation; Mode shape; Finite element analysis;
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