About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
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| Presentation Title |
Numerical Modeling of the Dynamic Compression Test Using Hopkinson Bar In The Aerospace Aluminum Alloy 7075-T6 |
| Author(s) |
Lucas Moura Montenegro Reis, Lucio Fabio Cassiano Nascimento, Sergio Neves Monteiro |
| On-Site Speaker (Planned) |
Lucas Moura Montenegro Reis |
| Abstract Scope |
This study presents a numerical simulation of the dynamic compression test on the aerospace aluminum alloy 7075-T6 using a Split Hopkinson Pressure Bar (SHPB). The model was developed in LS-DYNA using the explicit finite difference method and included all SHPB components: striker, incident, specimen, and transmitter bars. The constitutive model incorporated strain hardening without thermal effects. Results showed good qualitative agreement with experimental data, capturing wave propagation, dispersion, and reflection, as well as specimen barreling and increased yield strength due to high strain rates. The simulated yield strength exceeded quasi-static values, aligning with mechanisms like viscous drag and rapid dislocation multiplication. Although key physical phenomena were reproduced, stress and strain were slightly overestimated, suggesting the need for better parameter calibration and advanced fracture modeling. These findings enhance understanding of the dynamic behavior of 7075-T6, contributing to its application in high-performance structural components. |
| Proceedings Inclusion? |
Planned: |