Durability Evaluation of Ceramic Components Using CARES/LIFE-Reference-Cited by-同舟云学术

Durability Evaluation of Ceramic Components Using CARES/LIFE

Published:1996-01-01 Issue:1 Volume:118 Page:150-158
ISSN:0742-4795
Container-title:Journal of Engineering for Gas Turbines and Power
language:en
Short-container-title:

Author:

Nemeth N. N.¹,Powers L. M.²,Janosik L. A.¹,Gyekenyesi J. P.¹

Affiliation:

1. NASA Lewis Research Center, Cleveland, OH 44135

2. Department of Civil Engineering, Cleveland State University, Cleveland, OH 44135

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.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Link

http://asmedigitalcollection.asme.org/gasturbinespower/article-pdf/118/1/150/5535709/150_1.pdf

Reference27 articles.

1. Nemeth, N. N., Powers, L. M., Janosik, L. A., and Gyekenyesi, J. P., “Ceramics Analysis and Reliability Evaluation of Structures LIFE prediction program (CARES/LIFE) Users and Programmers Manual,” TM-106316, to be published.

2. Chao, L. Y., and Shetty, D. K., “Time-Dependent Strength Degradation and Reliability of an Alumina Ceramic Subjected to Biaxial Flexure,” Life Prediction Methodologies and Data for Ceramic Materials, ASTM STP 1201, C. R. Brinkman and S. F. Duffy, eds., American Society for Testing and Materials, Philadelphia, 1993.

3. Nemeth, N. N., Manderscheid, J. M., and Gyekenyesi, J. P., “Ceramics Analysis and Reliability Evaluation of Structures (CARES),” NASA TP-2916, Aug., 1990.

4. Powers, L. M., Starlinger, A., and Gyekenyesi, J. P., “Ceramic Component Reliability With the Restructured NASA/CARES Computer Program,” NASA TM-105856, Sept., 1992.

5. Barnett, R. L., Connors, C. L., Hermann, P. C., and Wingfield, J. R., “Fracture of Brittle Materials Under Transient Mechanical and Thermal Loading,” U. S. Air Force Flight Dynamics Laboratory, AFFDL-TR-66-220, (NTIS AD-649978), 1967.

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