Abstract
This study deals with failure strain prediction according to stress triaxiality of a typical polar class steel EH36. Choung et al. [1, 2] have formulated failure strain curve of EH36 steel by carrying out a number of tensile tests for round and flat specimens with various notches. Extra tests for notched flat specimens which machined in transverse direction are conducted to formulate the failure strain curve. In order to verify the validity of failure strain curve, we develop user-subroutine (VUSDFLD) of a commercial finite element code, Abaqus/Explicit. Fracture simulation with user-subroutine shows that two results are closely coincident by comparison of force-elongation curves.
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