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<p>Brake disks are essential for safe and reliable braking in automotive and motorcycle systems, where friction, fluid flow, and heat transfer are strongly coupled. While ventilation hole arrangements have been studied in automotive disks, little research has addressed thin motorcycle disks under emergency braking. Their reduced thickness and weight make them more prone to thermal and mechanical failure. This study employs Abaqus with the Umeshmotion subroutine to model a motorcycle brake disk and perform thermomechanical simulations of emergency braking. The analysis focuses on ventilation hole configurations and their influence on heat dissipation and wear. Results show that the optimized design lowers peak temperature and von Mises stress, extending the predicted thermal fatigue life from 23975 to 49150 cycles. Maximum wear depth is reduced from 12.55 to 7.47 µm. These findings demonstrate the critical role of ventilation hole design in improving thermal performance, wear resistance, and durability of motorcycle brake disks.</p>

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Effects of brake disk structure on heat dissipation and wear performance

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Jinchen Cai,
  • Qian Xu,
  • Jiale Yan,
  • Yongmin Lin,
  • Jianfeng Mao

摘要

Brake disks are essential for safe and reliable braking in automotive and motorcycle systems, where friction, fluid flow, and heat transfer are strongly coupled. While ventilation hole arrangements have been studied in automotive disks, little research has addressed thin motorcycle disks under emergency braking. Their reduced thickness and weight make them more prone to thermal and mechanical failure. This study employs Abaqus with the Umeshmotion subroutine to model a motorcycle brake disk and perform thermomechanical simulations of emergency braking. The analysis focuses on ventilation hole configurations and their influence on heat dissipation and wear. Results show that the optimized design lowers peak temperature and von Mises stress, extending the predicted thermal fatigue life from 23975 to 49150 cycles. Maximum wear depth is reduced from 12.55 to 7.47 µm. These findings demonstrate the critical role of ventilation hole design in improving thermal performance, wear resistance, and durability of motorcycle brake disks.