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:
- Publication Date:
- Research Org.:
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- OSTI Identifier:
- 5185061
- Report Number(s):
- N-94-24682; NASA-TM-106475; E-8402; NAS-1.15:106475; CONF-940626-
- Resource Type:
- Conference
- Resource Relation:
- Conference: 39. international gas turbine and aeroengine congress and exposition: maintain the edge, The Hague (Netherlands), 13-16 Jun 1994
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CERAMICS; COMPUTERIZED SIMULATION; MECHANICAL PROPERTIES; C CODES; CRACK PROPAGATION; MECHANICAL TESTS; COMPUTER CODES; MATERIALS TESTING; SIMULATION; TESTING; 360603* - Materials- Properties
Citation Formats
Nemeth, N N, Powers, L M, Janosik, L A, and Gyekenyesi, J P. Durability evaluation of ceramic components using CARES/LIFE. United States: N. p., 1994.
Web.
Nemeth, N N, Powers, L M, Janosik, L A, & Gyekenyesi, J P. Durability evaluation of ceramic components using CARES/LIFE. United States.
Nemeth, N N, Powers, L M, Janosik, L A, and Gyekenyesi, J P. Sat .
"Durability evaluation of ceramic components using CARES/LIFE". United States.
@article{osti_5185061,
title = {Durability evaluation of ceramic components using CARES/LIFE},
author = {Nemeth, N N and Powers, L M and Janosik, L A and Gyekenyesi, J P},
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 = {},
url = {https://www.osti.gov/biblio/5185061},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}