Evaluation of an experimental method via numerical simulations
In a classical compression or tensile test using a Hopkinson bar, the stress-strain relation is obtained via the strain measurement on the bars. From the signals on the input and output bar the deformation and the stress in the specimen are calculated. In the case of spall experiments, the output bar vanishes and well-established methods cannot be applied. For this reason Schuler et al. 2006 developed a method for the measurement of the tensile strength and fracture energy in a spall experiment. The method is specified and analyzed via numerical simulations within this paper.