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Hydraulically Driven Grips For Hot Tensile SpecimensPair of grips for tensile and compressive test specimens operate at temperatures up to 1,500 degrees F. Grips include wedges holding specimen inside furnace, where heated to uniform temperature. Hydraulic pistons drive wedges, causing them to exert clamping force. Hydraulic pistons and hydraulic fluid remain outside furnace, at room temperature. Cooling water flows through parts of grips to reduce heat transferred to external components. Advantages over older devices for gripping specimens in high-temperature tests; no need to drill holes in specimens, maintains constant gripping force on specimens, and heated to same temperature as that of specimen without risk of heating hydraulic fluid and acuator components.
Document ID
19940000342
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Bird, R. Keith
(NASA Langley Research Center, Hampton, VA.)
Johnson, George W.
(Analytical Services & Materials, Inc.)
Date Acquired
August 16, 2013
Publication Date
June 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 6
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LAR-14938
Accession Number
94B10342
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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