Abstract
The tensile behaviour of near α Ti3Al2.5 V alloy, conceived for applications in aerospace and automotive engineering, is characterized from quasi-static to high strain rates. The material is found to present noticeable strain rate sensitivity. The dynamic true strain rate in the necking cross-section reaches values up to ten times higher than the nominal strain rate. It is also observed that beyond necking the dynamic true stress-strain curves present limited rate dependence. The experimental results at different strain rates are used to determine a suitable constitutive model for finite element simulations of the dynamic tensile tests. The model predicts the experimentally macroscopic force-time response, true stress-strain response and effective strain rate evolution with good agreement.
| Original language | English |
|---|---|
| Pages (from-to) | 1126-1134 |
| Number of pages | 9 |
| Journal | Defence Technology |
| Volume | 17 |
| Issue number | 4 |
| Early online date | 9 Jul 2020 |
| DOIs | |
| Publication status | Published - 31 Aug 2021 |
Funding
No funding acknowledged.
Keywords
- Constitutive modeling
- Finite element simulation
- High strain rate
- Locking effect
- Near α titanium alloy
ASJC Scopus subject areas
- Computational Mechanics
- Ceramics and Composites
- Mechanical Engineering
- Metals and Alloys