Abstract
Dynamic response of foil strain gages is investigated in the ranges of up to approximately 300 kHz in frequency, 2000 με in strain and 750 s−1 in strain rate. Impulsive input is applied to the gages using elastic wave pulses in a circular bar. The input is determined by measuring the velocity of the bar end with a laser interferometer. It was confirmed that deviations from the static gage factors do not exceed−5 percent within the frequency range up to 45 kHz, 110 kHz and more than 290 kHz for 20-mm, 10-mm and 3-mm gages, respectively, and that the gage length is the dominant factor in the gages' frequency characteristics. This paper also mentions self-generated voltages.
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Ueda, K., Umeda, A. Dynamic response of strain gages up to 300 kHz. Experimental Mechanics 38, 93–98 (1998). https://doi.org/10.1007/BF02321650
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DOI: https://doi.org/10.1007/BF02321650