Application of Complete Gurson Model for Prediction of Ductile Fracture in Welded Steel Joints |
| Journal |
Key Engineering Materials (Volume 399) |
| Volume |
Advances in Strength of Materials |
| Edited by |
Liviu MARSAVINA |
| Pages |
13-20 |
| DOI |
10.4028/www.scientific.net/KEM.399.13 |
| Online since |
October, 2008 |
| Authors |
Bojan Međo,
Marko Rakin,
Nenad Gubeljak,
Aleksandar Sedmak
|
| Keywords |
Ductile Fracture, FEM Calculation, Gurson Flow Criterion, Micromechanical Model |
| Abstract |
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. |
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