Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1987-10-02
1989-02-21
Levy, Stewart J.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
250231R, G01L 124
Patent
active
048054615
ABSTRACT:
A transducer and system for optically indicating the level of stress experienced during loading. The system is designed for use in shock loading conditions. The transducer uses a transducer piece made from a crystalline luminescent material such as ruby. The transducer piece is preferably positioned between one or two support pieces, preferably along flat faces to create a uniform stress field within a limited detection area. The system uses the luminescent output from the detection area to produce a spectral output with time using a spectrometer and streak camera. The streak camera output is advantageously converted to digital signals for storage and analysis.
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Mao, H. K. et al., "Specific Volume Measurements of Cu, Mo, Pd, and Ag and Calibration of the Ruby R.sub.1 Fluorescence Pressure Gauge from 0.06 to 1 Mbar", Journal of Applied Physics, (Jun., 1978).
Richard A. Forman et al., "Pressure Measurement Made by the Utilization of Ruby Sharp-Line Luminescence", Science, vol. 176, (Apr., 1972).
P. D. Horn et al., "Wavelength Shift of the Ruby Luminescence R Lines Under Shock Compression", Applied Physics Letters, No. 49(14), (Oct. 6, 1986).
Gupta Y. M.
Horn Paul D.
Levy Stewart J.
Raevis Robert R.
Washington State University Research Foundation, Inc.
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