Data from a Torsion Split-Hopkinson Bar Experiment
Sample data from a torsion SHB experiment on a half-hard (H02) C464 brass specimen are shown below in Figure 1, Figure 2 and Figure 3. Figure 1 presents wave data from the experiment. Shear stress, shear strain rate and shear strain in the specimen are plotted versus time in Figure 2. Figure 2 shows that the shear strain rate is relatively constant at 5000.0 s-1 after a 50 microsecond rise time. The resultant shear stress versus shear strain curve is 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 an UFG (Ultra-Fine Grain) aluminum specimen tested on the torsion SHB are shown in Figure 4.