Standardized Bauer Piezoelectric Polymer Shock Gauge.

摘要

Earlier reports have described work to establish feasibility for a shock-compression, stress-rate or stress gauge based on a high quality polymer film, polyvinylidene difluoride (PVDF). We have now established standardized procedures to provide large quantities of PVDF gauge elements with highly reproducible electrical characteristics based on the process developed by Bauer. (The standard remnant polarization of a group of 100 gauges centered around a mean of 9.1 microcoulombs per square centimeter showed a standard deviation of 0.83 %.) We have also carried out piezoelectric response measurements of standardized gauge elements from 300 MPa to 46 GPa. Based on these measurements, it is now clear that the guage provides the capability to carry out time-resolved stress pulse measurements over a broad stress range. Unlike gauges utilizing piezoelectric crystals, the 25 micron thickness of the Bauer piezoelectric polymer gauge provides for unobtrusive and highly versatile gauge locations. The ability to provide a direct measure of stress-rate provides an unusually sensitive record of stress pulses. 7 refs., 1 tab. (ERA citation 13:051917)