| Title: |
A gradient-enhanced GTN model with Lode-dependent nucleation for ductile fracture in ferritic steels : from specimens to structural components |
| Authors: |
Catel, Emmanuelle; Lorentz, Eric; Dahl, Anna; Besson, Jacques |
| Contributors: |
ElectRotechnique et MEcanique des Structures (EDF R&D ERMES); EDF R&D (EDF R&D); EDF – Électricité de France (EDF E.D.F. )-EDF – Électricité de France (EDF E.D.F. ) |
| Source: |
ISSN: 0013-7944 ; Engineering Fracture Mechanics ; https://hal.science/hal-05528601 ; Engineering Fracture Mechanics, 2026, 331, pp.111703. ⟨10.1016/j.engfracmech.2025.111703⟩. |
| Publisher Information: |
CCSD; Elsevier |
| Publication Year: |
2026 |
| Subject Terms: |
Round notched bars; Plane strain specimens; Large scale test; Nomenclature CT Compact Tension specimen EPD Electric; CT and SENT specimens; Nonlocal GTN model; Ductile failure; Ferritic steel; Ferritic steel Ductile failure Nonlocal GTN model CT and SENT specimens Round notched bars Plane strain specimens Large scale test Nomenclature CT Compact Tension specimen EPD Electric; [PHYS]Physics [physics] |
| Description: |
International audience ; Ductile fracture behavior in ferritic steels is investigated using two complementary experimental databases. The first database involves a wide range of cracked and uncracked specimen geometries tested at various temperatures for a A533 (18MND5) steel, enabling a detailed analysis of the effect of stress states, particularly stress triaxiality and the Lode parameter, on damage nucleation and growth. The second database, for a WB36 (15NiCuMoNb5) steel, includes both laboratory-scale specimens and full-scale structural tests on precracked pipes at various temperatures. A gradientenhanced energy GTN (Gurson-Tvergaard-Needleman) model incorporating a Lode-parameterdependent nucleation function is employed to simulate ductile damage across different stress states. The model is first calibrated and validated on the A533 dataset. It is then applied to the WB36 dataset to assess its transferability from specimens to structural components. The results confirm the model's ability to accurately capture damage evolution and crack propagation, demonstrating its robustness and relevance for structural integrity assessments. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1016/j.engfracmech.2025.111703 |
| Availability: |
https://hal.science/hal-05528601; https://hal.science/hal-05528601v1/document; https://hal.science/hal-05528601v1/file/preprint_Catel_LorentzBessonDahl_GTN_application.pdf; https://doi.org/10.1016/j.engfracmech.2025.111703 |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.56CA4F0B |
| Database: |
BASE |