STP1450

    Predicting the Reliability of Ceramics Under Transient Loads and Temperatures with CARES/Life

    Published: Jan 2004


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    Abstract

    A methodology is shown for predicting the time-dependent reliability of ceramic components against catastrophic rupture when subjected to transient thermomechanical loads (including cyclic loads). The methodology takes into account the changes in material response that can occur with temperature or time (i.e., changing fatigue and Weibull parameters with temperature or time). This capability has been added to the NASA CARES/Life (Ceramic Analysis and Reliability Evaluation of Structures/Life) code. The code has been modified to have the ability to interface with commercially available finite element analysis (FEA) codes executed for transient load histories. Examples are provided to demonstrate the features of the methodology as implemented in the CARES/Life program.

    Keywords:

    reliability, transient, Weibull, cyclic, fatigue, failure, CARES, ceramics


    Author Information:

    Nemeth, NN
    Research Engineer, NASA Glenn Research Center, Cleveland, OH

    Jadaan, OM
    Professor, College of Engineering, Mathematics, and Science, University of Wisconsin-Platteville, WI

    Palfi, T
    Ph.D. Student, Budapest University of Technology and Economics, Budapest,

    Baker, EH
    Research Engineer, Connecticut Reserve Technologies, Stow, OH


    Paper ID: STP11284S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP11284S


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