Data from an Intermediate Strain Rate Test
Data from an intermediate strain rate experiment on a PR-520 epoxy resin specimen are shown below in Figure 1 and Figure 2. Figure 1 presents engineering stress and strain history data. The average strain rate for this experiment is ~95.0 s-1. True stress versus true strain curves for PR-520 covering a wide range of strain rates using three different test methods are presented in Figure 2. Black traces in Figure 2 are from experiments on a servohydraulic load frame while gray traces are from compression split-Hopkinson bar tests. The red trace, which lies between the servohydraulic and Hopkinson bar data, is from an experiment on the intermediate strain rate apparatus.