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A Study on Convergence Contact Behavior of Friction Heat and Pad on Disk Brake

디스크 브레이크에서 마찰열과 패드에 작용하는 융합 접촉거동에 관한 연구

  • Han, Seung-Chul (Department of Automobiles, Yeungnam University College) ;
  • Lee, Bong-Gu (Division of Mechanical Engineering Technology, Yeungnam University College)
  • 한승철 (영남이공대학교 자동차과) ;
  • 이봉구 (영남이공대학교 기계계열)
  • Received : 2017.11.26
  • Accepted : 2018.01.20
  • Published : 2018.01.28

Abstract

In automotive disc brake systems, frictional heat is not uniformly dispersed for reasons such as heat flux and thermal deformation. The thermoelastic deformation due to the frictional heat affects the contact pressure distribution and the contact load may be concentrated on the contact portion on the the disc brake surface, resulting in thermoelastic instability. In this study, thermal analysis and thermal deformation analysis considering the contact between disk and pad occurred during braking through 3D axial symmetry model with reference to the experimental equation and Kao's analysis method of contact pressure of disk and pad. ANSYS is used to analyze the thermal and elastic instability problems occurring at the contact surface between the disk and the pad, considering both the thermal and mechanical loads. A 3D axisymmetric model with direct contact between the disk and the pad was constructed to more accurately observe the thermal behavior of the disk by observing the frictional surface temperature, thermal deformation and contact thermal stress of the disk.

Keywords

Disk Brake;Finite Element Method;Thermal Judder;Thermal Stress;Thermal Behavior;Thermal Deformation

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