高速列车制动盘SiCp/A356颗粒增强铝基复合材料的热疲劳性能研究  

RESEARCH ON THE THERMAL FATIGUE BEHAVIORS OF THE COMPOSITES MATERIAL SiCp/A356 USED ON THE HIGH-SPEED TRAIN

作　　者：张俊清[1] 周素霞[2] 杨月[3] 谢基龙[1] 

机构地区：[1]北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044 [2]北京建筑工程学院机电与汽车工程学院,北京100044 [3]北汽福田汽车工程研究院整车性能中心,北京102206

出　　处：《工程力学》2011年第8期252-256,共5页Engineering Mechanics

基　　金：国家973项目(2007CB714705)

摘　　要：通过SiCp／A356颗粒增强复合材料切口试样在20℃-300℃循环下的热疲劳试验，获得热疲劳裂纹形成寿命与试样切口半径及厚度等几何尺寸的关系。采用热弹塑性有限元法模拟热疲劳试验中试样切口根部的应力．应变响应，进而揭示出残余应力形成机制。结合热疲劳试验的裂纹形成寿命与有限元模拟的应力．应变响应，建立起考虑平均应力影响的热疲劳应变寿命曲线，为高速列车SiCp／A356颗粒增强复合材料制动盘的热疲劳性能评价提供依据。Thermal fatigue tests are carded out to the notch specimens made of particle-reinforced composites entitled SiCp/A356 between 20℃ and 300℃. The test results show that the thermal fatigue crack initiation lives of different specimens are relative to the notch radius and specimen thickness. The thermal elastic-plastic finite element method is used to simulate the stress and strain response at the notch root of the thermal fatigue test specimen, and thus the formation mechanism of residual stress is revealed. Then according to the thermal fatigue crack initiation life tests and finite element simulation of the stress-strain, the thermal fatigue strain life curves of SiCp/A356 material are given considering the residual stress. This can give the basis for the thermal fatigue property study of the particle reinforced composite SiCp/A356 used in high-speed train brake disc.

关 键 词：制动盘 SiCp/A356复合材料 热疲劳寿命 热弹塑性有限元 疲劳裂纹 

分 类 号：U270.35[机械工程—车辆工程]