摘要
为了研究残余压应力对裂纹扩展的影响,通过子程序引入初始残余压应力,利用裂纹扩展仿真技术XFEM与VCCT相结合的方法进行裂纹扩展仿真计算,证实了残余压应力对裂纹扩展有显著的抑制作用;基于Zencrack仿真软件,结合S38C材质车轴试验得到的裂纹扩展参数,预测了CRH2型动车组用S38C材质车轴裂纹扩展寿命,并提出了车轴裂纹检测周期建议。
For research of impact of residual compressive stress on crack propagation,a subroutine will be used to introduce initial residual compressive stress.Then crack propagation simulation technology XFEM will be used in combination with VCCT,as a method,to perform simulation calculations for the crack propagation,thus demonstrating the residual compressive stress can impose significant restriction to the crack propagation.With simulation software Zencrack,crack propagation parameters have been obtained from tests with axle of material S38C,so that crack propagation life can be predicted for CRH2 EMU with axles of material S38C.In addition,proposal for time interval of axle crack detection is put forth.
作者
林浩博
仲崇成
高玉龙
李娜
LIN Haobo;ZHONG Chongcheng;GAO Yulong;LI Na(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266111,China;CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266031,China)
出处
《铁道车辆》
2023年第4期38-41,共4页
Rolling Stock
关键词
车轴
残余压应力
S38C
裂纹扩展
寿命
axle
residual compressive stress
S38C
crack propagation
life cycle
