Failure Analysis of Ceramic Components

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Ceramics are being considered for a wide range of structural applications due to their low density and their ability to retain strength at high temperatures. The inherent brittleness of monolithic ceramics requires a departure from the deterministic design philosophy utilized to analyze metallic structural components. The design program ''Ceramic Analysis and Reliability Evaluation of Structures Life'' (CARES/LIFE) developed by NASA Lewis Research Center uses a probabilistic approach to predict the reliability of monolithic components under operational loading. The objective of this study was to develop an understanding of the theories used by CARES/LIFE to predict the reliability of ceramic components ... continued below

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6274 Kilobytes pages

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Morris, B.W. June 29, 2000.

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  • Lockheed Martin
    Publisher Info: Lockheed Martin Corporation, Schenectady, NY 12301 (United States)
    Place of Publication: Schenectady, New York

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Description

Ceramics are being considered for a wide range of structural applications due to their low density and their ability to retain strength at high temperatures. The inherent brittleness of monolithic ceramics requires a departure from the deterministic design philosophy utilized to analyze metallic structural components. The design program ''Ceramic Analysis and Reliability Evaluation of Structures Life'' (CARES/LIFE) developed by NASA Lewis Research Center uses a probabilistic approach to predict the reliability of monolithic components under operational loading. The objective of this study was to develop an understanding of the theories used by CARES/LIFE to predict the reliability of ceramic components and to assess the ability of CARES/LIFE to accurately predict the fast fracture behavior of monolithic ceramic components. A finite element analysis was performed to determine the temperature and stress distribution of a silicon carbide O-ring under diametral compression. The results of the finite element analysis were supplied as input into CARES/LIFE to determine the fast fracture reliability of the O-ring. Statistical material strength parameters were calculated from four-point flexure bar test data. The predicted reliability showed excellent correlation with O-ring compression test data indicating that the CARES/LIFE program can be used to predict the reliability of ceramic components subjected to complicated stress states using material properties determined from simple uniaxial tensile tests.

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6274 Kilobytes pages

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OSTI as DE00821943

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  • Other Information: PBD: 29 Jun 2000

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  • Report No.: LM-00K047
  • Grant Number: AC12-00SN39357
  • DOI: 10.2172/821943 | External Link
  • Office of Scientific & Technical Information Report Number: 821943
  • Archival Resource Key: ark:/67531/metadc781027

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 29, 2000

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 28, 2016, 8:44 p.m.

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Morris, B.W. Failure Analysis of Ceramic Components, report, June 29, 2000; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc781027/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.