| Title: |
Investigation of Strain Hardening and Plastic Anisotropy Effect on Ductile Crack Propagation |
| Authors: |
Javangorouh, Sara; Nguyen, Van Dung; Kaniadakis, Antonio; Pardoen, Thomas; ESIS Technical Committee on Numerical Methods (TC8) and DVM-Working Group Simulation |
| Contributors: |
UCL - SST/IMMC/IMAP - Materials and process engineering |
| Publication Year: |
2025 |
| Collection: |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
| Subject Terms: |
Fracture toughness; crack initiation; metallic sheets |
| Description: |
Fracture toughness is a critical parameter in material selection and structural design. In this work, we first perform simulations using the J2 elastoplastic model under small-scale yielding and plane strain conditions to investigate the influence of strain hardening on fracture toughness, focusing on high Swift law strain hardening exponents (up to 0.5). The results demonstrate that fracture toughness increases with the strain hardening exponent, and the mechanisms responsible for this behavior are examined. Furthermore, a non-local Gurson–Tvergaard–Needleman (GTN) model is employed, which accounts for void nucleation, growth, and coalescence to provide a more accurate representation of crack initiation. Subsequently, knowing that most metallic alloys exhibit anisotropic behavior—where mechanical responses vary with loading orientation—we integrate the Hill48 plastic anisotropy model into the GTN-Thomason framework to explore the effects of anisotropy on fracture behavior. To this aim first, GTN-Thomason parameters are extracted by conducting unit-cell analysis on a transversely anisotropic matrix. These parameters are subsequently used to model a 3D DENT geometry under uniaxial loading conditions, and the resulting J–R curves are analyzed to assess the impact of anisotropy on fracture toughness. |
| Document Type: |
conference object |
| Language: |
English |
| Relation: |
boreal:304468; https://hdl.handle.net/2078.1/304468 |
| Availability: |
https://hdl.handle.net/2078.1/304468 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.548AA984 |
| Database: |
BASE |