A consistent use of the Gurson-Tvergaard-Needleman damage model for the R-curve calculation
Journal Title: Frattura ed Integrità Strutturale - Year 2013, Vol 7, Issue 24
Abstract
The scope of the present work is to point out a consistent simulation procedure for the quasi-static fracture processes, starting from the micro-structural characteristics of the material. To this aim, a local nine-parameters Gurson-Tvergaard-Needleman (GTN) damage law has been used. The damage parameters depend on the micro-structural characteristics and must be calculated, measured or opportunely tuned. This can be done, as proposed by the author, by using an opportunely tuned GTN model for the representative volume element simulations, in order to enrich the original damage model by considering also the defect size distribution. Once determined all the material parameters, an MT fracture test has been simulated by a FE code, to calculate the R-curve in an aeronautical Al-based alloy. The simulation procedure produced results in a very good agreement with the experimental data.
Authors and Affiliations
Gabriele Cricrì
Keywords
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- EP ID EP98468
- DOI 10.3221/IGF-ESIS.24.17
- Views 66
- Downloads 0
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