在役管道材料的低周疲劳性能测试

2611200711RESEARCHANDEXPLORATIONINLABORATORYVol.26No.11Nov.20071,2,2(1.,221008;2.,102249):X602,,,:;;;:TE973;O34813:A:1006-7167(2007)11-0196-03LowCyclicFatigueExperimentsofPipelineSteelinServiceLIYa2ping1,JIAOZhong2liang2,SHUAIJian2(1.SinopecPipelineStorage&TransportationCorporation,XUZhou221008,China;2.ChinaUniversityofPetroleum,ChangpingBeijing,China)Abstract:LowcyclicfatigueexperimentswereconductedforX60inpetroleumtransmissionpipelineinservice.Strain2cyclecurvewasfitandpipelinefatiguelifewasevaluatedfromtheexperiment.Thestudymaybeusedasreferenceforthesafetymaintenanceofthepetroleumtransmissionpipeline.Keywords:pipeline;low2cyclicfatigue;experiment;remaininglifeCLCnumber:TE973;O348.3Documentcode:AArticleID:1006-7167(2007)11-0196-03:2007-05-10:(1973-),,,,,,20002004915,1192,463,[1][2,3]Nf105,Nf105,,,,,,,,105,,,,,,,1,X60,01079%C,01939%Mn,01275%Si,010014%S,010044%P,010052%N(711mm10mm612MPa,50[4],1:MTS810125,:013%;:0;:1Hz1Table1Cross2sectionsizeofspecimensABC/mm7.947.67.26/mm15.6215.6816.962211250002Table2Young’smodulusofthematerials/MPa/MPaA194332.7855196176.3910B179058.9031188566.52752121AB013%,,AB13000,1400080%12Fig.1Thecirculationfrequency2stresscurveofspecimens21323AB,2AFig.2ThepartiallaggingringofspecimenA3BFig.3ThepartiallaggingringofspecimenB2144,,2153C4Fig.4Fractureofspecimens3CTable3ThegeneralmechanicalpropertiesofspecimenCf/MPaf/%b/MPaE/MPaC1080.83850.928660.4960019000079111,:322Manson2Coffin:t=e+p=fE(2Nf)b+f(2Nf)c(1),f,b,f,c.,f=1.12bfb0.893(2-a)b=-0.0792+0.179logfb(2-b)f=0.413f1-81.8bEfb0.179-13(2-c)c=-log3.310.25f1-81.8bEfb0.179-13(2-d),f-,f-,b-,E-2,,Manson2Coffin2,Manson2Coffinf,f,b,3,Manson2Coffin,4:4Manson2CoffinTable4ParametersofManson2CoffinequationfbfC1136.65-0.12460.4293-0.5608Manson2Coffin:t=0.00598(2Nf)-0.1246+0.4293(2Nf)-0.5608(3)Manson2Coffin,,,Manson2Coffin,25:52Fig.5TheStrain2fatiguelifecurveofthematerial4,23,13000,130005[5,6],265,13000/265=49(),,,5(1),13000,1400080%,(2),2(3),,(References):[1].[M].:,1989.[2].[M].:,1995.[3]..[M].:,1991.[4]GB307582,[S].:,1982.[5],,.[J].,1998,24(5):6232624.[6],.[J].,2000,22(3):36238.89126