A technique to achieve uniform stress distribution in compressive creep testing of advanced ceramics at high temperatures

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Description

A technique to achieve stable and uniform uniaxial compression is offered for creep testing of advanced ceramic materials at elevated temperatures, using an innovative self-aligning load-train assembly. Excellent load-train alignment is attributed to the inherent ability of a unique hydraulic universal coupler to maintain self-aligning. Details of key elements, design concept, and pricniples of operation of the self-aligning coupler are described. A method of alignment verification using a strain-gaged specimen is then discussed. Results of verification tests indicate that bending below 1.5% is routinely achievable usin the load-train system. A successful compression creep test is demonstrated using a dumbbell-shpaed Si ... continued below

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6 p.

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Liu, K.C.; Stevens, C.O.; Brinkman, C.R. & Holshauser, N.E. May 1, 1996.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 13 times . More information about this article can be viewed below.

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Description

A technique to achieve stable and uniform uniaxial compression is offered for creep testing of advanced ceramic materials at elevated temperatures, using an innovative self-aligning load-train assembly. Excellent load-train alignment is attributed to the inherent ability of a unique hydraulic universal coupler to maintain self-aligning. Details of key elements, design concept, and pricniples of operation of the self-aligning coupler are described. A method of alignment verification using a strain-gaged specimen is then discussed. Results of verification tests indicate that bending below 1.5% is routinely achievable usin the load-train system. A successful compression creep test is demonstrated using a dumbbell-shpaed Si nitride specimen tested at 1300 C for over 4000 h.

Physical Description

6 p.

Notes

OSTI as DE96008085

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  • 41. American Society of Mechanical Engineers (ASME) international gas turbine and aeroengine congress and exposition, Birmingham (United Kingdom), 10-13 Jun 1996

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  • Other: DE96008085
  • Report No.: CONF-960608--4
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 228503
  • Archival Resource Key: ark:/67531/metadc668830

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  • May 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 21, 2016, 12:54 p.m.

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Liu, K.C.; Stevens, C.O.; Brinkman, C.R. & Holshauser, N.E. A technique to achieve uniform stress distribution in compressive creep testing of advanced ceramics at high temperatures, article, May 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc668830/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.