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THE STRESS-STRAIN CONVERTER. INSTRUMENTATION FOR THE SIMULTANEOUS MEASUREMENT OF STRESS AND STRAIN IN A TENSILE-TEST SPECIMEN,
GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CALIF
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This report describes a system for the measurement and recording of the stress and strain, to an accuracy of plus or minus 1, in a tensile-test specimen at cryogenic temperatures. The system consists of a variable-inductance extensometer and a strain-gage load cell as the transducers, a recorder, and the stress-strain converter. The converter supplies carefully controlled excitation voltages to the transducers and demodulates the ac signal from the extensometer. Author
APPROVED FOR PUBLIC RELEASE