An Impact Test to Determine the Wave Speed in SHPB: Measurement and Uncertainty

Post-processing the strain waves in split Hopkinson pressure bars to get the stress-strain in the sample requires the knowledge of the characteristic wave speed $c_0 in the measuring bars. In the context of metrology, the measurement uncertainty in the value of c_0 must be assessed. The aim is to minimize this uncertainty, which depends on the way c_0 is determined, as it has an impact on the uncertainty in the final stress and strain...