The numerical modeling of failure of S235JR steel using Gurson-Tvergaard-Needleman material model
关键词: Structural engineering 、 Materials science 、 Numerical analysis 、 Ultimate tensile strength 、 Plasticity 、 Porous medium 、 Porosity 、 Computer simulation 、 Microstructure 、 Bearing capacity
摘要: The paper presents assumptions of the Gurson-Tvergaard-Needleman (GTN) model for a porous materials, which is now one basic damage material models applied in analysis load-bearing capacity metal engineering structures. practical information about selection GTN parameters and performing numerical calculations given. An example simulation failure tensile element made S235JR steel presented. calculation procedure, determined microstructure obtained results are described. simulations included strength study micro-defects growth occurring during plasticity process As result critical volume void fraction was can be used as microvoid criterion corresponding to expected failure.
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