DONG Jian-peng, WANG Shi-long, ZHOU Jie, YANG Bo, MA Chi. THE DUCTILE FRACTURE CRITERION OF STAINLESS-STEEL TUBES IN THE SHEARING PROCESS BASED ON MODIFIED GTN MODEL[J]. Engineering Mechanics, 2021, 38(3): 239-247. DOI: 10.6052/j.issn.1000-4750.2020.05.0303
Citation: DONG Jian-peng, WANG Shi-long, ZHOU Jie, YANG Bo, MA Chi. THE DUCTILE FRACTURE CRITERION OF STAINLESS-STEEL TUBES IN THE SHEARING PROCESS BASED ON MODIFIED GTN MODEL[J]. Engineering Mechanics, 2021, 38(3): 239-247. DOI: 10.6052/j.issn.1000-4750.2020.05.0303

THE DUCTILE FRACTURE CRITERION OF STAINLESS-STEEL TUBES IN THE SHEARING PROCESS BASED ON MODIFIED GTN MODEL

  • To improve the defect that the modified Gurson-Tvergaard-Needleman model (modified GTN model) cannot accurately simulate the shearing process of stainless-steel tubes, a displacement-related damage function is constructed as a new fracture criterion based on the original model. A VUMAT user subroutine of the modified model is developed in ABAQUS using the implicit backward Euler stress updating algorithm. A shear experiment of SUS304 stainless-steel tubes was carried out, and the accuracy and validity of the proposed method was verified by comparing the experimental and simulated results.
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