Abstract
Dynamic tests for 7075-T6 aluminum alloy under quasi-static, medium strain rate and high strain rate were performed by using an electronic universal testing machine a high velocity hydraulic servo-testing machine and a split Hopkinson tensile bar (SHTB) at room temperature. Stress-strain curves under different strain rates were obtained. The experimental results showed that the strain rate hardening effect of 7075-T6 aluminum alloy is obvious; the necking phenomenon of specimens' fracture is more remarkable with increase in strain rate. A Johnson-Cook constitutive model reflecting strain rate hardening effect of 7075-T6 aluminum alloy was fitted. The term of strain rate hardening in Johnson-Cook equation was modified to make the fitted results agree better with the test ones.
| Original language | English |
|---|---|
| Pages (from-to) | 110-114 and 125 |
| Journal | Zhendong yu Chongji/Journal of Vibration and Shock |
| Volume | 33 |
| Issue number | 18 |
| DOIs | |
| State | Published - 28 Sep 2014 |
Keywords
- 7075-T6 aluminum alloy
- Constitutive relation
- Experiment
- Johnson-Cook model
- Strain rate
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