考虑焊缝疲劳的工程车轮弯曲疲劳寿命分析  

Cornering fatigue life analysis of wheel rim considering the weld seam fatigue

作　　者：姚楚[1] 石光林[1] 陈晨[1] 

机构地区：[1]广西科技大学机械工程学院,广西柳州545006

出　　处：《广西科技大学学报》2017年第3期66-71,共6页Journal of Guangxi University of Science and Technology

基　　金：广西科学研究与技术开发计划项目(桂科攻1598008-23)资助

摘　　要：工程车轮作为一种典型的焊接结构件,其结构中包含多条焊缝,在车轮弯曲疲劳试验过程中,焊缝承受着较大的动应力,极易产生应力集中并导致裂纹萌生.为对焊缝处进行疲劳分析,在采用逆向工程技术创建包含焊缝在内的工程车轮三维实体模型的基础上,建立了车轮弯曲疲劳分析的有限元模型,分别选择名义应力法和BS7608标准对车轮焊缝区和非焊缝区进行疲劳分析,得到工程车轮的弯曲疲劳寿命,与不考虑焊缝的车轮弯曲疲劳寿命对比,工程车轮弯曲疲劳最危险的位置为轮辐和轮辋角接焊缝处而非轮辐的螺栓孔附近.最后对上述仿真和计算结果进行了试验验证,证明了包含焊缝的车轮有限元模型和分析方法的正确性.As a typical welded structure, wheel rim includes a few weld seams. During the process of cornering fatigue tests, weld seams which bear a greater dynamic stress, are apt to produce stress concentration leading to crack initiation, therefore the fatigue analysis of weld seams can＇t be ignored. Firstly, this paper uses reverse engineering to create the solid model of wheel rim with weld seams. Then the finite element model of wheel cornering fatigue test is set up, the nominal stress method is selected to analyze the fatigue life of non-welding zone and BS7608 standard is applied to analyze the fatigue life of welding zone, then cornering fatigue life of wheel is obtained. By comparing the fatigue life with the wheel which has no weld seams, it shows that the most fatigue dangerous place is the weld seam. Finally, corresponding tests are carried out to verify the results of above simulation and calculation. It proves that the finite element model of the wheel rim with weld seams is correct.

关 键 词：弯曲疲劳试验 逆向工程 焊接结构疲劳 工程车轮 

分 类 号：TH11[机械工程—机械设计及理论]