Application of Complete Gurson Model for Prediction of Ductile Fracture in Welded Steel Joints |
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| Journal | Key Engineering Materials (Volume 399) |
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| Volume | Advances in Strength of Materials |
| Edited by | Liviu MARSAVINA |
| Pages | 13-20 |
| DOI | 10.4028/www.scientific.net/KEM.399.13 |
| Citation | Bojan Međo et al., 2008, Key Engineering Materials, 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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