Data From a Tension Split-Hopkinson Bar Experiment
Sample data from a tension SHB experiment on a 2024-T351 aluminum specimen are shown below in Figure 1, Figure 2 and Figure 3. Figure 1 presents wave data from the experiment. Engineering stress, strain rate and engineering strain in the specimen are plotted versus time in Figure 2. Figure 2 shows that the shear strain rate is relatively constant at 500.0 s-1 after a 40 microsecond rise time. Engineering and true stress versus strain curves are shown in Figure 3.
Three dimensional digital image correlation can be used to measure the surface strains of a specimen loaded with this apparatus. Surface strains of a titanium alloy (Ti-6Al-4V) specimen tested on the tension SHB are shown in Figure 4. The region of high strains in the center of the specimen is clear evidence of a necking localization.