ABSTRACT
K1/0"net=VoXf(d/D). fiGURE17Theparametersofacircumferentiallynotchedroundbarthatareusedin fracturemechanicstocalculatethetensilemodestressintensity~-
tensilefastenerofagivendiameterD.K,cismeasuredaccordingtoASTMSTDE399or E1290.TheyieldstrengthismeasuredaccordingtoASTMSTDE8(Fig.2).ForK,jYSvalues abovetheline,boltsoftheindicatedsizescanbesuccessfullymanufactured,exhibitingductile fracture.abovethespecifiedstrengthinatensiletest.ForK,cfYSvaluesbelowtheline,bolts oftheindicatedsizescannotbesuccessfullymanufactured,exhibitingbrittlefracturebelow thespecifiedstrengthinatensiletest.
