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Title: Material test machine for tension-compression tests at high temperature

Abstract

Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter alia, an autoclave housing the specimen which is being tested. The specimen is connected to a pull rod which couples out of the autoclave to an external assembly which includes one or more transducers, a force balance chamber and a piston type actuator. The pull rod feeds through the force balance chamber and is compensated thereby for the pressure conditions existing within the autoclave and tending to eject the pull rod therefrom. The upper end of the push rod is connected to the actuator through elements containing a transducer comprising a linear variable differential transformer (LVDT). The housing and coil assembly of the LVDT is coupled to a tube which runs through a central bore of the pull rod into the autoclave where it is connected to one side of the specimen. The movable core of the LVDT is coupled to a stem which runs through the tube where it is then connected to the other side of the specimen through a coupling member. A transducer in the form of a load cell including one or more strainmore » gages is located on a necked-down portion of the upper part of the pull rod intermediate the LVDT and force balance chamber.« less

Inventors:
 [1]
  1. (Pittsburgh, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
866667
Patent Number(s):
4762003
Assignee:
United States Department of Energy (Washington, DC) BAPL
DOE Contract Number:  
AC11-76PN00014
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
material; machine; tension-compression; tests; temperature; apparatus; providing; device; testing; properties; specimens; temperatures; pressures; controlled; water; chemistries; alia; autoclave; housing; specimen; tested; connected; pull; rod; couples; external; assembly; transducers; force; balance; chamber; piston; type; actuator; feeds; compensated; pressure; conditions; existing; tending; eject; therefrom; upper; push; elements; containing; transducer; comprising; linear; variable; differential; transformer; lvdt; coil; coupled; tube; runs; central; bore; movable; core; coupling; form; load; cell; including; strain; gages; located; necked-down; portion; intermediate; coil assembly; strain gages; pressure conditions; load cell; cell including; central bore; differential transformer; variable differential; linear variable; pull rod; strain gage; force balance; transducer comprising; conditions existing; /73/

Citation Formats

Cioletti, Olisse C. Material test machine for tension-compression tests at high temperature. United States: N. p., 1988. Web.
Cioletti, Olisse C. Material test machine for tension-compression tests at high temperature. United States.
Cioletti, Olisse C. Fri . "Material test machine for tension-compression tests at high temperature". United States. https://www.osti.gov/servlets/purl/866667.
@article{osti_866667,
title = {Material test machine for tension-compression tests at high temperature},
author = {Cioletti, Olisse C.},
abstractNote = {Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter alia, an autoclave housing the specimen which is being tested. The specimen is connected to a pull rod which couples out of the autoclave to an external assembly which includes one or more transducers, a force balance chamber and a piston type actuator. The pull rod feeds through the force balance chamber and is compensated thereby for the pressure conditions existing within the autoclave and tending to eject the pull rod therefrom. The upper end of the push rod is connected to the actuator through elements containing a transducer comprising a linear variable differential transformer (LVDT). The housing and coil assembly of the LVDT is coupled to a tube which runs through a central bore of the pull rod into the autoclave where it is connected to one side of the specimen. The movable core of the LVDT is coupled to a stem which runs through the tube where it is then connected to the other side of the specimen through a coupling member. A transducer in the form of a load cell including one or more strain gages is located on a necked-down portion of the upper part of the pull rod intermediate the LVDT and force balance chamber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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