The choice of strain gage for use in a large superconducting alternator

Conference · Fri Jan 01 00:00:00 EST 1982 · Adv. Cryog. Eng.; (United States)

OSTI ID:6443257

Ferrero, C; Desogus, S

Electrical strain gages are investigated from ambient to liquid-helium temperatures. Experimental determination of the curves of apparent strain vs. temperature were especially considered, because of the role of thermal and mechanical stresses in a superconducting rotor in the cooling and operational phases. Commercially available Karma and modified-Karma alloy foil strain gages were used. These were either applied on the surface of supports of Cu, Al, Incar, AISI 304L, Araldite, and Nb, or embedded inside the specimen. Results are analyzed in terms of 4.2 to 7.2 range, 4.2 to 30 K range, reversal temperature, behavior with strain, and power dissipation effects. Conclusions are formulated with proposed applications to a wide range of technological items which require stress measurement and control in a narrow temperature range near 4.2 K.

• Research Organization: Instituto di Metrologia-''G. Colonnetti'', Torino
• OSTI ID: 6443257
• Report Number(s): CONF-810835-
• Journal Information: Adv. Cryog. Eng.; (United States), Vol. 27; Conference: 1981 cryogenic engineering conference, San Diego, CA, USA, 10 Aug 1981
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALTERNATORS
STRAIN GAGES
SUPERCONDUCTIVITY
SCATTERING
TEMPERATURE DEPENDENCE
ELECTRIC CONDUCTIVITY
ELECTRIC GENERATORS
ELECTRICAL PROPERTIES
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
420800* - Engineering- Electronic Circuits & Devices- (-1989)
420201 - Engineering- Cryogenic Equipment & Devices