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Title: Durability evaluation of ceramic components using CARES/LIFE

Abstract

The computer program CARES/LIFE calculates the time-dependent reliability of monolithic ceramic components subjected to thermomechanical and/or proof test loading. This program is an extension of the CARES (Ceramics Analysis and Reliability Evaluation of Structures) computer program. CARES/LIFE accounts for the phenomenon of subcritical crack growth (SCG) by utilizing the power law, Paris law, or Walker equation. The two-parameter Weibull cumulative distribution function is used to characterize the variation in component strength. The effects of multiaxial stresses are modeled using either the principle of independent action (PIA), the Weibull normal stress averaging method (NSA), or the Batdorf theory. Inert strength and fatigue parameters are estimated from rupture strength data of naturally flawed specimens loaded in static, dynamic, or cyclic fatigue. Application of this design methodology is demonstrated using experimental data from alumina bar and disk flexure specimens, which exhibit SCG when exposed to water.

Authors:
; ;  [1];  [2]
  1. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
  2. Cleveland State Univ., OH (United States). Dept. of Civil Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
207762
Report Number(s):
CONF-940626-
Journal ID: JETPEZ; ISSN 0742-4795; TRN: IM9616%%90
Resource Type:
Journal Article
Journal Name:
Journal of Engineering for Gas Turbines and Power
Additional Journal Information:
Journal Volume: 118; Journal Issue: 1; Conference: 39. international gas turbine and aeroengine congress and exposition, The Hague (Netherlands), 13-16 Jun 1994; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; CERAMICS; MECHANICAL PROPERTIES; INTERNAL COMBUSTION ENGINES; DESIGN; DIESEL ENGINES; GAS TURBINE ENGINES; C CODES

Citation Formats

Nemeth, N N, Janosik, L A, Gyekenyesi, J P, and Powers, L M. Durability evaluation of ceramic components using CARES/LIFE. United States: N. p., 1996. Web. doi:10.1115/1.2816531.
Nemeth, N N, Janosik, L A, Gyekenyesi, J P, & Powers, L M. Durability evaluation of ceramic components using CARES/LIFE. United States. https://doi.org/10.1115/1.2816531
Nemeth, N N, Janosik, L A, Gyekenyesi, J P, and Powers, L M. Mon . "Durability evaluation of ceramic components using CARES/LIFE". United States. https://doi.org/10.1115/1.2816531.
@article{osti_207762,
title = {Durability evaluation of ceramic components using CARES/LIFE},
author = {Nemeth, N N and Janosik, L A and Gyekenyesi, J P and Powers, L M},
abstractNote = {The computer program CARES/LIFE calculates the time-dependent reliability of monolithic ceramic components subjected to thermomechanical and/or proof test loading. This program is an extension of the CARES (Ceramics Analysis and Reliability Evaluation of Structures) computer program. CARES/LIFE accounts for the phenomenon of subcritical crack growth (SCG) by utilizing the power law, Paris law, or Walker equation. The two-parameter Weibull cumulative distribution function is used to characterize the variation in component strength. The effects of multiaxial stresses are modeled using either the principle of independent action (PIA), the Weibull normal stress averaging method (NSA), or the Batdorf theory. Inert strength and fatigue parameters are estimated from rupture strength data of naturally flawed specimens loaded in static, dynamic, or cyclic fatigue. Application of this design methodology is demonstrated using experimental data from alumina bar and disk flexure specimens, which exhibit SCG when exposed to water.},
doi = {10.1115/1.2816531},
url = {https://www.osti.gov/biblio/207762}, journal = {Journal of Engineering for Gas Turbines and Power},
number = 1,
volume = 118,
place = {United States},
year = {1996},
month = {1}
}