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工程结构脆性断裂事故分析.doc

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工程结构脆性断裂事故分析.docidentofengineeringstructureSteelbrittleandstructuralbrittlefracture,zhoushunshen,Shanghaiscieneeandtechnologypress,1983Sincetheturnofthecentury,Bridges,ships,pipelines,pressurewindow,sphericaltank,ident・Inthelast20years,theweldingstructurehasbeenbrittle,withtheweldingstructure,thethicknessofthesteelstructureandtheadoptionofhigh-,petroleumindustry,,topromotethestudyofbrittlefractureproblem,Britain,identanalysisandresearch,andputforwardtheengineeringstructurebrittlefracturepreventionmeasures・brittlefractureofpressurevesselThefractureofpressurevesselmaybeofplasticfracture,lowstressbrittlefractureandfatiguedamage,,,ident18cases,oneofthemosttypicalexampleis:ident・identisduetotheinsufficientstrengthoftheentirestoragetank,especiallythelackofconsiderationoflocalstressconcentration,sothatthebrittlefractureisproducedundertheinternalpressureofthesyrup・Inthe40softhiscenturyismoreoutstanding,identsin1943theUnitedStates,NewYorkhasadiameterof12meterslargeairtank,whenthetemperaturedroppedtobrittlefracturewhenit-12°C・panyasphericalliquidgasstoragetank(,,5poundspersquareinch,workingtemperature162°C)ident・TheUnitedStatesaworkingtemperatureof1945-110°owerofbrittlefracture・Thewinterof1947whentheSovietunionseveraloilstoragetankin43°Ctemperature-brittlefracture・In1965-71,urredinthepressurevessel・idents・(1)thechemicalammoniasynthesiscontainerisbrittleIn1965,thelargethickwallpressurevesselusedbytheUK,sImminghanammoniaplantwasrupturedduringwaterpressuretesting・,2metersindiameterand150mmthick・ThematerialoftheshellisMn-cr-mo-

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