Abstract
The validity of the split-Hopkinson-pressurebar technique for measuring dynamic strain and stress is examined by comparing the average strain computed by use of that technique with the strain at the midpoint of the sample. The midpoint strain is measured by use of the inter-ferometric-strain-gage method. It is found that the midpoint surface strain and the average strain agree quite well after a strain of approximately 1 percent. It is concluded that the pressure-bar technique is valid for large strains.
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Sharpe, W.N., Hoge, K.G. Specimen strain measurement in the split-Hopkinson-pressure-bar experiment. Experimental Mechanics 12, 570–574 (1972). https://doi.org/10.1007/BF02320601
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DOI: https://doi.org/10.1007/BF02320601