复合型裂纹断裂的新准则_任利(7)

发布时间:2021-06-07

复合型裂纹断裂的新准则

第1期                 任利等: 复合型裂纹断裂的新准则

ticlasticboundarasthecorereioninfracturecri-p       -yg ,teria.EnnJ].EnineerinFractureMechanics gg[gg ():1982,163425432.-

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]fractureinitiation[J.EnineerinFractureMechan  -gg 

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,():&Structures2000,235381386.-[]10rózKP.FatiueCracksGrowthintheBimaterialSs M        -gy

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),,():())inScienceEdition20053741114.inChinese - g ][17atollahiM R,AlihaM R M,HassaniM M.Mixed A   y

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NEW FRACTURECRITERIONFOR MIXED MODECRACKS   

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LiRenheminZhuinzhiXieuZhaninAi   Z  L   R  ggg  Tg  

1 (KeLaboratoroEnerEnineerinSaetand Disaster Mechanics,MinstroEducation,y yf gy gg fyyf    

)ColleeoArchitectureand Environment,Sichuan UniversitChendu,610065  gf y,g2 (State KeLaboratoroHdraulicand Mountain RiverEnineerinSchooloWaterResource    y yf ygg,f  

)Hdroower,Sichuan UniversitChendu,610065and ypy,g

,AbstractormixedmodeIIIcracksthelasticzonedistributionaroundcracktisisanalzedtheo F   -          -ppy

,reticall.Twoofwhichcanbeusedtoevaluatetheeffectofcracktistressfieldonrousarameters               ypgpp 

,,,crackroaationlasticareintroducedwithlocaldeformationbeinconsidered.Inthisstudweadot         ppgpgyp :()thefollowintwoassumtions1cracksinthedirectioninwhichthereionboundarisroaatelastic            gpgyppgp  

()theshortesttothecrackti2oncetheradiusfromcracktitotheshortestlasticreionboundarrea               -p;ppgy  ,,chesthecriticalvaluethecrackstartstoroaate.Basedontheseassumtionsanewfracturecriterion             ppgpformixedodecrackisdeveloed.Thecomarisonswiththeexistinfracturecriterionsandtheexeri -m           -ppgp mentalresultsshowtheresentcrackroaationcriterionivesanareementoodredictionwiththe              pppggggp,,exeriments.Moreoverthelimitationoftheexistinsinlearameter(KⅠCorKⅡC)criterionareresent        pggpp andtheeffectofthecracktistressfieldonthemixedodecrackroaationisalsodiscussedindetail.          -m       pppg 

,,Kewordsixedmodecrack,initiationanlefracturecriterioncriticalradius m     gy 

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