RESEARCH PAPERS: Gas Turbines: Vehicular

Reliability Analysis of Uniaxially Ground Brittle Materials

[+] Author and Article Information
J. A. Salem, N. N. Nemeth

NASA Lewis Research Center, Cleveland, OH 44135

L. M. Powers, S. R. Choi

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

J. Eng. Gas Turbines Power 118(4), 863-871 (Oct 01, 1996) (9 pages) doi:10.1115/1.2817007 History: Received February 08, 1995; Online November 19, 2007


The fast fracture strength distribution of uniaxially ground, alpha silicon carbide was investigated as a function of grinding angle relative to the principal stress direction in flexure. Both as-ground and ground/annealed surfaces were investigated. The resulting flexural strength distributions were used to verify reliability models and predict the strength distribution of larger plate specimens tested in biaxial flexure. Complete fractography was done on the specimens. Failures occurred from agglomerates, machining cracks, or hybrid flaws that consisted of a machining crack located at a processing agglomerate. Annealing eliminated failures due to machining damage. Reliability analyses were performed using two and three-parameter Weibull and Batdorf methodologies. The Weibull size effect was demonstrated for machining flaws. Mixed mode reliability models reasonably predicted the strength distributions of uniaxial flexure and biaxial plate specimens.

Copyright © 1996 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In