Fracture Criterion Calibration and Finite Element Simulation in SUS304 Stainless Steel

In order to calibrate the ductile fracture criterion in SUS304 stainless steel, four tensile samples were designed, their finite element models were established, and uniaxial tensile tests were carried out. The simulation results were compared with the tests. Due to the limitations of finite element software, only a few criteria can be solved in MENTAT of MSC.MARC 2013. In order to make the ductile fracture criteria universal, the HYPELA2 subroutine was used to write the ductile fracture criteria, and the three-point bending simulation was used to verify the ductile fracture criteria program. Finally, the calibration results of different fracture criteria are compared with the test results. The results show that the error between the finite element results of four samples and the test results is small, which verifies the feasibility of the finite element model. Based on the Oh criterion, the correctness of HYPELA2 subroutine development is verified by a three-point bending simulation. In the SH sample, the Freudenthal, C-L, and LeRoy criteria have a better prediction ability, and the prediction error of other criteria is relatively large. All the criteria have a strong prediction ability for the NT20 and CH05 samples.