Open AccessPredicting the Reliability of Ceramics Under Transient Loads and Temperatures with CARES/Life
Author(s) -
NN Nemeth,
OM Jadaan,
T. Pálfi,
Eric Baker
Publication year - 2004
Publication title -
journal of astm international
Language(s) - English
Resource type - Journals
ISSN - 1546-962X
DOI - 10.1520/jai11578
Subject(s) - weibull distribution , transient (computer programming) , reliability (semiconductor) , ceramic , finite element method , materials science , reliability engineering , structural engineering , computer science , composite material , engineering , mathematics , thermodynamics , physics , operating system , statistics , power (physics)
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.
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