Constitutive Model and Fracture Criterion of Q345 Steel Welded Joints

Table 2

Measurement data of round bar specimens.

No.	Section diameter of specimen, D (mm)	Diameter of necking section, 2a (mm)	Average necking section’ triaxial stress degree
B-6-SB	5.972	—	0.333
B-6-B	5.964	—	0.333
B0.5-6-B	6.972	5.904	1.173
B2-6-B	7.065	6.016	0.640
B-6-SH	5.945	—	0.333
B-6-H	5.956	—	0.333
B0.5-6-H	7.117	5.953	1.178
B2-6-H	7.094	6.036	0.641