Durability evaluation of ceramic components using CARES/LIFE
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- Cleveland State Univ., OH (United States). Dept. of Civil Engineering
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.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 207762
- Report Number(s):
- CONF-940626-; ISSN 0742-4795; TRN: IM9616%%90
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Vol. 118, 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
Similar Records
Lifetime reliability evaluation of structural ceramic parts with the CARES/LIFE computer program
Time-dependent reliability analysis of ceramic engine components