ISSN: 1546-962X
Published Online: 30 August 2004
Page Count: 19

Predicting the Reliability of Ceramics Under Transient Loads and Temperatures with CARES/Life
Nemeth, NN
Research Engineer, Life Prediction Branch, NASA Glenn Research Center, 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,

Baker, EH
Research Engineer, Connecticut Reserve Technologies, OH

(Received 17 September 2002; accepted 23 December 2003)

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

Paper ID: JAI11578
DOI: 10.1520/JAI11578
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