Material test machine for tension-compression tests at high temperature

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866667

Cioletti, Olisse C ^[1]

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1. Pittsburgh, PA

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.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (United States)
• DOE Contract Number: AC11-76PN00014
• Assignee: United States Department of Energy (Washington, DC)
• Patent Number(s): US 4762003
• OSTI ID: 866667
• Country of Publication: United States
• Language: English

Related Subjects

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/