Sensitivity analysis of GTN damage parameters: Application to notched plate ductile fracture simulation

The evolution of preexisting voids causes damage to metal structures with large plastic deformation. In the ABAQUS-Explicit computer code, the damage by the Gurson-Tvergaard-Needleman model (GTN model) is included in the porous failure criteria law. The numerical predictions using the GTN model are...

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Bibliographic Details
Published in:Mechanics of advanced materials and structures 2024-12, Vol.31 (27), p.9191-9199
Main Authors: Gouasmi, Sadek, Mokhtari, Mohamed, Slamene, Amir, Hamza, Billel, Benzaama, Habib, Abdelouahed, Elamine, Nadji, Loubna
Format: Article
Language:English
Subjects:
Damage
Deformation analysis
Ductile fracture
Evolution
Flow theory
Gurson-Tvergaard-Needleman model
Notch sensitivity
notched plate
Nucleation
Numerical prediction
Parameter sensitivity
Plastic deformation
Sensitivity analysis
voce's hardening model
void volume fraction
Voids
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Summary:The evolution of preexisting voids causes damage to metal structures with large plastic deformation. In the ABAQUS-Explicit computer code, the damage by the Gurson-Tvergaard-Needleman model (GTN model) is included in the porous failure criteria law. The numerical predictions using the GTN model are very sensitive to the calibrations of these parameters of the experimental results. This model describes until the damage, the mechanism of the evolution of the voids, which begins with their growth and their nucleation with the particles until the coalescence of these voids of a critical level, which causes the damage to the structure. This analysis uses Voce's hardening model and von Mises' equivalent stress flow theory. After validation with experimental results, this work aims to analyze the sensitivity of these GTN parameters to the response to damage and to the evolution of the gaps. This objective is applied on a plate notch.
ISSN:1537-6494
1537-6532
DOI:10.1080/15376494.2023.2267290