Stress Level Indicator for Real-Time, in-situ Stress Gauge Calibration

摘要

A dropbar system has been developed to produce stress pulses above 1 GPa with durations of about 500 microns. These pulses are of similar shape and amplitude to those encountered in large explosive tests. This system was to have been used to test a stress level indicator based on the electronic phase transition which occurs in cerium metal; however, due to the extreme reactivity of Ce, no gauges could be constructed. We observed reactions with epoxy over a period of several days which may explain the erratic results of a previous study. (Author)