复合材料的安全系数统计分析pdf

36120042JournalofNanjingUniversityofAeronautics&AstronauticsVol.36No.1Feb.2004,,,,,(,,210016):(Fiber2reinforcedplastics,FRP),Weibull,Gumbelf,FRP,011,0115012FRP,011,0115012,,:FRP;;;:TB323;O21312:A:100522615(2004)0120022207:(20020287022):2002212203;:2003202217:,,,19794,E2mail:[e-mail];,,,,19571;,,,,19655;,,,1978;,,,1978;,,,1980StatisticalAnalysisonSafetyFactorofCompositeMaterialsLIUKe2long,YAOWei2xing,YUXiong2qing,MUXue2feng,XUEFei,HUANGAi2feng(CollegeofAerospaceEngineering,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China)Abstract:Inordertofindpropervaluesofsafetyfactorwhendesigningstructuresoffiber2reinforcedplastics,therelationshipsbetweensafetyfactorandreliabilityofsomefiber2reinforcedplasticsarestatisticallyanalyzed.BasedonthereliabilitymodelinwhichGumbeldistributionisusedforthestressandWeibulldistributionwiththreeparametersforstrengthofcompositematerials.ThescatterboundofsafetyfactorofFRPispresentedwhenthevariationcoefficientofthestressis011,0115or012andthereliabilityis0199or019999.Forothervariationcoefficientsofthestressandthereliability,thesafetyfactorcanbederivedbyusingthediagrams.Andthesafetyfactorhassomethingtodowithvariationcoefficientsofthestrengthandthestress.Thesedatahaveanimportantreferencevalueforthestructuredesignofthecompositematerial.Keywords:fiber2reinforcedplastics;reliability;safetyfactor;statisticalanalysis,(Fiber2reinforcedplastics,FRP),,,,,,,f=115;FRP,,©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1]WeibullfRe[2],,[3]fRe,,,1fRE(R)SE(S)f==E(R)E(S)(1),Re=5(B)[4]Re=-sfR(r)drfS(s)ds(2):fR(r);fS(s);BfRe,1f,RS1RWeibull,Gumbel,Re=-sfR(r)drfS(s)ds=1ASDRexp-e-s-DSs-s-DSAS-s-DRBRARds+1ASDR0exp-e-s-DSs-s-DSASds(3)DR,DSWeibull(3),fRe2211(CFRP),6CFRP,231,(3),21(),1CFRP(a)nE(R)öMPaVRAS24ö3502[5][+45nö-45nö0nö90n][0]8n[02nö902n]s12342312347777567767634160010410156614701026244641690106149377166010498713581800111224139318301090678431230112935814150010733579616001052017641730102961321,:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(b)E(R)öMPaVRIM7öE7T122[6]09045522681030103993591412401031624691430102273528113101022975919176010323056691760102764IM7öX1845[6]09045524201470104592587413901045505681670107633525811401034695898146010350445821880102407G402800Xö525523[6]09045510511110103200582717801056535491640111355527110301030245105111101031995689113130102794IM7ö525523[6]090455267014801027565571020105993525717301040465991112010289856551350103176IM7ö5260[6]09045528351330103957592719701034875851150104168526014801035115958144010386758131510101547(a)AS24ö3502[+45nö-45nö0nö90n](b)AS24ö3502[0]8n4236©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(c)AS24ö3502[02nö902n]s(d)IM7öE7T122(e)IM7öX1845(f)G402800Xö525523(g)IM7ö525523(h)IM7ö52602CFRP(B)2(ac),2(dh)2(c)011,113115,0199,117119,019999;0115012,0199,115116116118,210212214216,521,:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(GFRP),252öMPaöMPaöMPaöMPa5241954621892691042251005311754331332941692031965411183971852501642231535651063501882411242431565421874661672461652141195931494521382621532061176161473öHD203öMPaöMPaöMPaöMPa3912602853104402693233124142812793573412283202542683143032602852423104öHD203öMPaöMPaöMPaöMPa45536123618743234423819543137121017343434721118246534022819550öMPa0öMPa90öMPa90öMPa75712882010146180206182772197803143451761991368151938831134411719419880012874512643125205131833194858179421302051378231168331394016020714981610379513940151208118(3)4,f,33,,011,113114,0199,117118,019999;0115012,0199,115116116118,210212214215,019999(a)(b)öHD2036236©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(c)öHD203(d)3GFRP(B)213öHD2036,,f,46öHD203öMPaöMPa3102512913043362543093343443384öHD203(B)4,öHD203,011,113114,0199,117118,019999;0115012,0199,115116116117,210211214215,019999214öHD2037,,f,57öHD203öMPaöMPaöMPa3783611803903441753643711853883471904133402045,öHD203,011,113114,0199,117118,019999;0115012,0199,115116116117,210211214215,019999721,:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(B)3f,FRP,:(1),88fRe0199Re019999CFRP0111131151171190115115116210212012116118214216GFRP01111311411711801151151162102120121161182142150111131141171180115115116210211012116117214215(2)011,011501225011,0115012,(3),,:[1],.[J].,2002,28(2):205207.[2].[J].(),2000,21(3):223225.[3].[J].,1999,5:35.[4],.[M].:,1997.3541.[5]LavoieAJ.Strengthscalingofcompositelaminatesamidstinvariant0.Plystrength[EBöOL].http:ööscholar.lib.vt.eduöthesesöavailableöetd24131162939721181öunrestrictedöetd2part2.pdf,1997204204.[6]CanoRJ,DowMB.Propertiesoffivetoughenedmatrixcompositematerials[R].NASATP23254.8236©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.