摘要
热斑和热裂纹是钢铁制动盘摩擦面在服役过程中普遍存在的热损伤现象。本文采用热-机耦合模拟计算和理论分析相结合的方法,对铝合金和锻钢制动盘的摩擦面热损伤进行比较,研究材料性能对摩擦面热损伤的影响。研究表明,在相同的制动条件下,铝合金制动盘的摩擦面热损伤明显比锻钢制动盘轻,铝合金低的弹性模量和良好的导热性能使铝合金制动盘摩擦面无热裂纹、少热斑甚至无热斑。
Hotspots and thermal cracks are the common thermal damages to the friction surfaces of brake discs during service. Through combining thermal-mechanical coupling simulation and theoretical analysis, the thermal damages of the aluminium alloy and forged steel brake discs were compared and the effects of material properties on the thermal damages of the friction surfaces were studied. The results show as follows： Under the same braking conditions, the thermal damages of the friction surfaces of the aluminium alloy brake discs are obviously less than the forged steel brake discs; the friction surfaces of the aluminium alloy brake discs are free from thermal cracks and hotspots or a large number of hotspots due to the low Young＇s modulus and good ther mal conductivity of aluminium alloy.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2009年第4期43-46,共4页
Journal of the China Railway Society
基金
北京交通大学科技基金资助项目(2008RC062)
关键词
制动盘
热损伤
热斑
热裂纹
热-机耦合
brake disc
thermal damage
hotspot
thermal crack
thermal-mechanical coupling
