解读应力强度因子

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(430080),12,,,:,,,,,,1:(É),(Ê),(Ë),,É,ÉÉ11920GriffithGriffith,,,:,2,,2a,,2a,R,,RFRF=2ECPa(1),E,C,RRF,,GriffithGriffith1949,Orowan,111Vol.11No.120002JournalofUniversityforStaffandWorkersofWISGCODecember.2000X:1999_11_15©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1):RF=2E(C+CP)Pa(2)CP,,,CP0,,CPmC(2):RF=2ECPPa(2)1975,Irwin,(1)(2):RFPa,,RFPa,,,Irwin2Irwin,2,,,,rA,RYRy=RPa2PrcosH2(1+sinH2sin32H)(3)12PrcosH2(1+sinH2sin32H);RPa,rH,RPaRPa,IrwinKÉÊËKÊKËKÉ=RPa(4),,Y(4):KÉ=YRPa(4),,,,Y=1112,,3,,,É,,,,,,KÉCÊËKÊCKËCKÉC,,KÉCKÉKÉC()KÉKÉC()K:Rb,,96:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.É,4,,,,,,,:(1),,2a(2),,,,R(3),,,Y(4)KÉC,,(5),n=KÉCöKÉ,n1,n,,n,n1,(6),,,,,,5(1)(3),KÉ,R2a,(H=0)Rr,r=0,RY,,,,(2),A,A,2,Q0,,KÉA:KÉ=limQ012PQRA(3)KÉCKÉ,KÉ,;KÉC,,KÉKÉC;KÉCKÉ(4),,,,,GÉ,ÊËGÊGËGÉKÉ:GÉ=K2ÉöE(76)072000,11(1)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1],,,:[2],:(70)(5),,,r(3),r=0,Ry,,,,,[1],,,1987[2],,,1989[3],,,1997[4]Knott,,,,1995InterpretationofStressstrengthFactorLeiZhendeAbstract:Inthisarticle,acomprehensivedescriptionismadeofstressstrengthfactorinlinearelasticfracturemechanics,Whichwouldbehelpfultobothteachingandlearmingoffracturemecharmicsasacourse.Keywords:fracturemechanics,stressstrengthfactor,breaKingtougliness.672000,11(1)