Abstract
The distribution of temperatures gradient and thermal stress of brake disc has been simulated by FEM code to make brake disc thermal stress more homogenously. In this study, using moment of inertia to simulate the realistic brake process instead of theoretically predefines the train deceleration rate, nonlinear deceleration rate and thermo-mechanical behavior has been revealed. The FEM models build upon LS-DYNA® thermo-mechanical code and contact algorithm. Non-uniform temperature alone disc radial direction was caused by severe friction in short time and the low heat transfer coefficient of its material. Parametric analysis for disc brakes have been carried out by comparison of grouped brake applications conform to UIC code, the main factor cause the high temperature gradient and thermal stress of brake disc is brake force and its initial speed.
Highlights
Disc brake in brief: For high speed train, the braking technology get fast pace worldwide especially in China, even the main brake method is electricity or eddy current brake but frictional brake is a redundancy backup and reliable way to stop the train in emergency
The premature wear and thermal cracking of brake discs are attributed to high thermal stress, as the speed of train getting faster and during brake process, more heat need to be distribute to brake disc and pad friction pair, which cause higher thermal stress
Even the brake discs have been extensively studied and comprehensive reviews can be founded, the kinetic energy specified by moment of inertia instead of predefine deceleration rate is never performed
Summary
Disc brake in brief: For high speed train, the braking technology get fast pace worldwide especially in China, even the main brake method is electricity or eddy current brake but frictional brake is a redundancy backup and reliable way to stop the train in emergency. The premature wear and thermal cracking of brake discs are attributed to high thermal stress, as the speed of train getting faster and during brake process, more heat need to be distribute to brake disc and pad friction pair, which cause higher thermal stress. The higher the train speed, the higher kinetic energy the train possesses during transportation, need scatter more heat to disc brake system. This study will use a innovated way to simulate the brake disc thermal stress distributions and the main factors cause the high thermal stress
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Research Journal of Applied Sciences, Engineering and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
