Abstract: 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.