An Investigation of the Mechanical Behavior of Metals at High Strain Rates in Torsion.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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A Torsional Split Hopkinson Bar Testing System was developed and analyzed for the existence of higher mode strains in the two elastic bars. The testing device was used to obtain high strain rate data for Aluminum 1100-0, Aluminum 2024-T3 and Titanium 50A. Using the Aluminum 2024-T3 an investigation into the effect of specimen gage length was carried out and from the data for Titanium 50A a plastic strain rate expression of the exponential type was deduced. This expression was used in a numerical plastic wave study and the results compared with the equivalent actual experiments. The effect of changing the constants in the plastic strain rate expression was also investigated. Author
- Metallurgy and Metallography