Analysis of Stick-slip Phenomenon during Brake Creep Groan Using Acoustic Emission Technique

DOI

Bibliographic Information

Other Title
  • アコースティックエミッション計測を用いたクリープグローン発生時のスティックスリップ現象解析

Abstract

Creep groan is a phenomenon in which the brake is released while the vehicle is stopped, stick-slip occurs friction surface and vibration sound of 10-300Hz is generated. Improving this phenomenon is an important issue for the quietness and comfort of automobiles. Numerous studies have been conducted on the mechanism of creep groan generation, and it has been reported that the oscillation force is a stick-slip phenomenon at the friction interface. However, it was rare to directly measure the friction phenomenon during creep groan and evaluate the relationship with vibration. Acoustic emission (AE) is a phenomenon in which strain energy stored inside a material is released. AE technique can be used to elucidate the friction phenomenon. In this study, the AE signals of the brake pads where creep groan is occurring under the condition that the brake is released were measured. Then, it was confirmed that the brake parts are shaken every time a slip caught as an AE occurs. It was found that there is a good correlation between the AE signal amplitude and the acceleration vibration of the rotor. By analyzing the generation cycle, intensity, and frequency of AE signals, it was also confirmed how brake opening conditions and humidity affect the stick-slip phenomenon.

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Keywords

Details 詳細情報について

  • CRID
    1390576502655663104
  • DOI
    10.11351/jsaeronbun.54.271
  • ISSN
    18830811
    02878321
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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