A high-pressure dilatometer was devised to measure the length change of specimens under hydrostatic pressure up to 22 kilobars. The dilatometer uses a linear variable differential transformer and exhibits a hysteresis with pressure cycling. With a careful calibration of the dilatometer vs pressure, instantaneous measurements of the length change of a specimen can be made within a precision of less than 0.025%.
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N. Mizouchi (1973) studied this question.
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