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Title: Apparatus for tensile testing plate-type ceramic specimens

Apparatus is described for gripping a plate-type tensile specimen having generally T-shaped end regions in a dynamic tension fatigue testing apparatus comprising an annular housing having an open-ended elongated cavity therein, a plurality of hydraulic piston means supported by the housing in a spaced array about the cavity, and a specimen-supporting plate means overlying the piston means at one end of the elongated cavity and displaceable by said piston means in a longitudinal direction with respect to the longitudinal axis of the cavity, said apparatus for gripping a flat plate-type tensile specimen comprising: a pair of elongated pull rods each having oppositely disposed first and second end regions; a pair of mounting means carried by said plate means with each mounting means for pivotally attaching the first end region of each of said pull rods in a central region of said plate means for supporting said pair of elongated pull rods in a side-by-side relationship along a common longitudinal centerline within said cavity; recess means in the second end region of each of said pull rods in adjacently disposed surface regions thereof with said recess means facing one another and each adapted to receive one side of one of themore » generally T-shaped end regions of the plate-type tensile specimen; and load-bearing means positionable in each of said recess means and adapted to bear against a shoulder on each side of the generally T-shaped end region of the plate-type tensile specimen when a tensile loading is applied thereon.« less
Inventors:
Issue Date:
OSTI Identifier:
6292417
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) IMS; EDB-93-122102
Patent Number(s):
US 5237876; A
Application Number:
PPN: US 7-922451
Contract Number:
AC05-84OR21400
Resource Relation:
Patent File Date: 29 Jul 1992
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CERAMICS; MATERIALS TESTING; SAMPLE HOLDERS; DESIGN; EQUIPMENT; FATIGUE; HYDRAULICS; PISTONS; PLATES; POSITIONING; SUPPORTS; FLUID MECHANICS; MACHINE PARTS; MECHANICAL PROPERTIES; MECHANICAL STRUCTURES; MECHANICS; TESTING; 420500* - Engineering- Materials Testing