THE TECHNIQUES FORDETERMINING THE CODRESlSTANCE CURVE FOR AROUND TEST BAR

The basic principles of measuring theCOD resistance curve for a round test bar accordingto unloading compliance single specimen techniquesand the methods for acquiring and processing datawith microcomputer were introduced. The COD re-sistance curve for a round test bar of HQ60 steel wasdetermined. The results show that the techniqueshave high precision.