Application of Complete Gurson Model for Prediction of Ductile Fracture in Welded Steel Joints
Ductile fracture process includes three stages: void nucleation, their growth and coalescence. The voids nucleate due to the fracture or separation of non-metallic inclusions and secondary-phase particles from the material matrix. Micromechanical models based on the Gurson plastic flow criterion are often used for analysis of ductile fracture. They consider the material as a porous medium in which the effect of voids on the stress-strain state and plastic flow cannot be neglected. Another important property of the Gurson criterion is that the hydrostatic stress component influences the plastic flow of the material.
B. Međo et al., "Application of Complete Gurson Model for Prediction of Ductile Fracture in Welded Steel Joints", Key Engineering Materials, Vol. 399, pp. 13-20, 2009