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Cryogenic insulation strength and bond testerA method and apparatus for testing the tensile strength and bonding strength of sprayed-on foam insulation attached to metal cryogenic fuel tanks is described. A circular cutter is used to cut the insulation down to the surface of the metal tank to form plugs of the insulation for testing in situ on the tank. The apparatus comprises an electromechanical pulling device powered by a belt battery pack. The pulling device comprises a motor driving a mechanical pulling structure comprising a horizontal shaft connected to two bell cracks which are connected to a central member. When the lower end of member is attached to a fitting, which in turn is bonded to a plug, a pulling force is exerted on the plug sufficient to rupture it. The force necessary to rupture the plug or pull it loose is displayed as a digital read-out.
Document ID
19860011370
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Schuerer, P. H. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Ehl, J. H. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Prasthofer, W. P. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 12, 2013
Publication Date
October 22, 1985
Subject Category
Structural Mechanics
Accession Number
86N20841
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MFS-25910-1|US-PATENT-4,548,083
Patent Application
US-PATENT-APPL-SN-548582

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