摘要
针对某型汽车催化器端盖开裂问题,通过材料金相分析和模拟仿真分析,考虑排气系统的高温影响,发现在高温工况下材料的力学性能下降,导致了零件热疲劳强度降低,零件的等效塑性应变增量超过推荐值1%,并找到了构件断裂的主要原因。因此温度对排气系统的排气系统设计的影响不可忽视,热疲劳分析能够有效的提升重要零件的开发效率。
Through metallographic analysis and simulation analysis of the material,this paper analyzes the cracking problem of the end cover of a certain type of automobile catalyst.It is found that the mechanical properties of the material decrease under the high temperature condition,which leads to the decrease of the thermal fatigue strength of the parts.The equivalent plastic strain increment of the parts exceeds the recommended value by 1%,and the main reason for the fracture of the components is found.Therefore,the influence of temperature on the exhaust system design can not be ignored.Thermal fatigue analysis can effectively improve the development efficiency of important parts.
作者
谢文奇
Xie Wenqi(Faurecia(Liuzhou)Control Technology Co.,Ltd.,Liuzhou 545000,China)
出处
《汽车与驾驶维修》
2021年第4期63-65,共3页
Auto Driving & Service
关键词
排气系统
流-固耦合
热机械疲劳
等效塑性应变增量
exhaust system
fluid-structure coupling
thermal mechanical fatigue(TMF)
the equivalent plastic strain increments
