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Data from a Compression Split-Hopkinson Bar Experiment

Sample data from a compression SHB experiment on a 2024-T351 aluminum specimen are shown below in Figure 1, Figure 2 and Figure 3.    Figure 1 presents the wave data from the experiment.   Engineering stress, strain rate and engineering strain in the specimen are plotted versus time in Figure 2.  The black and gray traces in Figure 3 represent the engineering and true stress-strain curves, respectively. 

Three dimensional digital image correlation can be used to measure the surface strains of a specimen loaded with this apparatus.  DIC data from a 6061-T6 aluminum specimen tested on the compression SHB are shown in Figure 4. Strain contours from the ends of the incident and transmitter bars are also shown.  Data acquired with DIC provide an independent measurement of strain that can be compared to data calculated using traditional SHB data reduction techniques.

Wave data from a compression SHB experiment.
Figure 1. Wave data from a compression SHB experiment.
Reduced history data from a compression SHB experiment.
Figure 2. Reduced history data from a compression SHB experiment.
Stress versus strain curves from a compression SHB experiment.
Figure 3. Stress versus strain curves from a compression SHB experiment.
Surface strain contours of a 6061-T6 aluminum compression SHB specimen and the ends of both the incident and transmitter bars.
Figure 4. Surface strain contours of a 6061-T6 aluminum compression SHB specimen and the ends of both the incident and transmitter bars.