Damage analysis of doubler plate reinforced T-joints under uniaxial tensile load based on stress triaxiality

摘要

Finite element analysis software ABAQUS is used to simulate the damage response of doubler plate reinforced tubular T-joints subjected to uniaxial tensile loads in previous experimental investigation, the damage initiation criterion used in this study is based on the Bao-wierzbicki locus which is about the relationship between equivalent plastic strain and stress triaxiality. All of the parameters of Bao-wierzbicki locus come from the metal tubular bar tensile test. The comparison of the analytical and experimental results indicates that the finite element analysis curves, considering the damage criterions, match well with the experimental curves, which proves that the proposed damage criterions could accurately simulate the degraded characteristics of strength and stiffness of tubular joint under uniaxial tensile load. But the failure mode of tubular joints during simulation and experiment process are different, a further research will be given in the following study.