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Characterization of Automotive Brake Discs with Laser-Machined Surfaces

Automotive Innovation 2019年第3期2卷 190-200页

作者： Shuwen Wang Wang Guo Kang Zeng Xuegang Zhang College of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China

In the automotive and transport industry,braking noise and vibrations are persisting issues and difficult to ***-tive engineers and researchers are putting considerable effort into overcoming these problems,and significant breakthroughs have been made in this *** this study,M-shaped grooves were bionically designed and manufactured on the frictional surfaces of four automotive brake discs using a laser *** tests were conducted to characterize the physical and mechanical performance of the modified discs along with their noise and vibration *** experimental results demonstrate that discs with laser-machined grooved surfaces have better surface hardness and residual stress reduction than discs with un-grooved *** improvement in the braking performance was observed in terms of disc thickness variation,friction and wear,noise,and vibration *** is concluded that the reduction in braking noise and vibrations is mainly caused by the reduction in the coefficient of friction and wear,increase in damping ratio,and improvement of disc thickness variation of the brake disc by laser surface grooving.

关键词： Brake disc Bionic design Laser machining Disc thickness variation Residual stress Friction and wear vibration and noise

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