在高寒环境下高速列车制动盘由于外界硬质颗粒随着冰雪包裹进入制动盘和闸片而导致划伤是制动盘的主要失效形式，因此对制动盘的制动过程进行有限元模拟分析有助于辅助研究和解决制动盘失效问题，而针对数值模拟划伤的产生对制动盘制动性能的影响规律国内外鲜有研究。采用ABAQUS软件中的子模型技术研究了划伤位置、深度和缺口角度对铸钢制动盘紧急制动过程中的温度场及应力场分布的影响。研究结果表明：在相同的缺口圆角半径下（r=0.1 mm），对制动盘最大等效应力的影响程度为划伤深度 > 划伤位置 > 缺口角度。最大等效应力随着划伤深度的增大而增加，但在划伤深度一定的条件下，最大等效应力对缺口角度的敏感度较低。在划伤处于半径为247.5 mm，缺口角度为30°，当划伤深度为3 mm时，最大等效应力超过常温时制动盘材料的屈服强度。
孟繁辉
,
刘艳
,
吴影
,
马元明
,
陈辉
. 高速列车制动盘制动过程的有限元模拟及表面划伤对应力场的影响研究[J]. 机械工程学报, 2018
, 54(12)
: 42
-48
.
DOI: 10.3901/JME.2018.12.042
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.
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