Scratch is the main failure form of the brake disc in the alpine environment of high-speed train. The braking process of brake disc is simulated by finite element method, which contributes to study and solution of the brake disc failure problem. However, the effect of scratch on performance of the brake disc is rarely studied. The influence of the position, depth and notch angle on the temperature field and stress field of the brake disc during emergency braking was studied by using the sub model technique in ABAQUS software. The results showed that under the same fillet radius (r=0.1 mm), the influence degree of the maximum equivalent stress of the brake disc was the depth of the scratch > scratch position > notch angle. The maximum equivalent stress increased with the increase of the depth of the scratch, while the scratch depth reached a certain, the maximum equivalent stress of the brake disc had low sensitivity to notch angle. The maximum equivalent stress exceeded the yield strength of the brake disc material when the scratch was in the radius of 247.5 mm, notch angle 30° and the depth was 3 mm.
MENG Fanhui
,
LIU Yan
,
WU Ying
,
MA Yuanming
,
CHEN Hui
. Research on Finite Element Simulation of Braking Process of High Speed Train Brake Disc and Influence of Surface Scratch on Stress Field[J]. Journal of Mechanical Engineering, 2018
, 54(12)
: 42
-48
.
DOI: 10.3901/JME.2018.12.042
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