About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
2025 Graduate Student Poster Contest
|
| Presentation Title |
SPG-13: Exploring the Interaction of Plastic Anisotropy and Strain-Rate Sensitivity for a 6061-T6
Aluminum |
| Author(s) |
Carter Fietek, Jeremy D. Seidt, Hojun Lim, Yannis P. Korkolis |
| On-Site Speaker (Planned) |
Carter Fietek |
| Abstract Scope |
This work focuses on the relationship of plastic anisotropy and strain-rate sensitivity for a rolled sheet of 6061-T6 aluminum. It examines whether it is feasible to calibrate material models for each phenomenon independently of each other. The constitutive model consists of a Yld2000-2D anisotropic yield function, and combined Cowper-Symonds and Johnson-Cook strain-rate dependence. The anisotropic yield function is calibrated through a series of quasi-static uniaxial tension and plane-strain tension tests in different directions and disk compression experiments. The strain-rate dependence is calibrated using uniaxial tension experiments in the rolling direction across a range of strain rates (10^-4 to 1500 1/s) on a standard load frame and two Hopkinson bar setups. Validation of the models is considered through hole-expansion experiments conducted with a flat-headed punch (65 mm diameter) under both quasi-static and dynamic loading scenarios. Comparisons of simulations and experiments for load-displacement and strains are used to evaluate rate-sensitivity and anisotropy. |