Probabilistic Cyclic Stress-Strain Relations of a Cast Steel for RailwayBogie Frame

摘要：

Experimental study is performed on the probabilistic cyclic stress-strain responses of gradeB cast steel,which is utilized in the manufacture of Chinese K6 type bogie.Fatigue test is carried outby an incremental strain-controlled method with 8 strain levels.Analysis of test data and observationon fatigue fracture surfaces of test specimens indicate that difference and evolution of localconditions are basic causes of the random fatigue damage behavior.So it is verified again that therandom character of stress-strain responses is an intrinsic fatigue behavior of engineering materials.Taking the scattering regularity and the size of specimens into account,cyclic constitutive models ofpresent test data with arbitrary probability and confidence are obtained.The analysis reveals thatthese models can reflect the random responses of material correctly.

关键词： Cast steel Cyclic stress-strain relations Probabilistic analysis

作者: B.Yang Y.X.Zhao J.C.Peng L.Y.Yu W.D.Shao

作者单位: Institute of Engineering Reliability and Safety,State Key Laboratory of Traction Power,Southwest Jia Qiqihaer Railway Vehicle Group Co.Ltd,Qiqihaer 161002,China

会议类型: 国际会议

会议名称: 2008 International Conference on Advances in Product Development and Reliability(2008年产品开发与可靠性进展国际会议)

会议地点: 成都

会议语种:英文

在线出版日期: 2008-08-04（万方平台首次上网日期，不代表论文的发表时间）