| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
Numerical Simulation of Shear Band Formation and Fracture in Collapsing Thick-walled Cylinder Experiment |
| Author(s) |
Nicola Bonora, Gianluca Iannitti, Zev Lovinger, Sara Ricci, Andrew Ruggiero, Gabriel Testa, Roman Kositski |
| On-Site Speaker (Planned) |
Nicola Bonora |
| Abstract Scope |
Shear significantly affects the fracture strain of various materials and alloys, in which reduced fracture strain is observed in torsion compared with the uniaxial tensile condition. At high strain rates, shear localization becomes an important and often dominant failure mode, acting as a precursor to catastrophic failure. The dynamic collapse of a thick-walled cylinder (TWC) is an excellent test configuration to investigate spontaneous shear localization and validate material damage modeling. Here, adiabatic shear bands development and fracture in Ti-6Al-4V has been investigated by carrying out numerical simulations using the plasticity-damage self-consistent (PDSC) model recently extended to account for strain rate and temperature effects. Firstly, PDSC model parameters for the candidate material were determined. Successively, parametric finite element simulations using LS-DYNA were performed to investigate mesh sensitivity and geometry perturbation effects. Finally, computational results were compared with available experimental results in terms of the number and spacing of predicted shear bands. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Mechanical Properties |