Accession Number:

ADA090532

Title:

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

Descriptive Note:

Final rept. Feb 78-Mar 79,

Corporate Author:

PACIFICA TECHNOLOGY DEL MAR CA

Personal Author(s):

• Gaffney,E. S.
• Riersgard,P. L.
• McCaffrey,N. G.

Report Date:

1979-08-29

Pagination or Media Count:

24.0

Abstract:

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

Descriptors:

• *PHASE TRANSFORMATIONS
• *STRESS TESTING
• *NUCLEAR EXPLOSION SIMULATION
• *STRAIN GAGES
• *CALIBRATION
• STRESSES
• METALS
• MEASUREMENT
• REAL TIME
• DIELECTRICS
• SEMICONDUCTORS
• CERIUM
• PRESSURE
• HARDNESS
• UNDERGROUND STRUCTURES
• YTTERBIUM

Subject Categories:

• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE