Validation of ring-on-ring flexural test for nuclear ceramics using miniaturized specimens

S. Kondo, Y. Katoh, J. W. Kim, L. L. Snead

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

For the purpose of evaluating fracture strength of the inner pyrocarbon (IPyC) layer of TRISO fuel particles, a miniature disc equibiaxial flexural test technique was developed. It was applied to nuclear graphite specimens in a variety of combination of sample thickness and loading ring diameter to investigate the influences on the stress uniformity within the loading ring. Although similar and relatively high Weibull modulus were observed for all conditions (m ≇ 20), the significant stress concentration associated with the large deflection was observed at the loading location for thinner specimens (t;<0.2mm). However, the true local fracture stress was successfully estimated from the measured fracture load using finite element analysis. The method for estimating true local fracture stress appear reasonable for evaluating the fracture strength of dense poly-crystalline graphite, and can be used for determination of the statistical parameters for fracture stress of graphite and pyrocarbon.

Original languageEnglish
Title of host publicationCeramics in Nuclear Applications - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites
Pages83-92
Number of pages10
Edition10
Publication statusPublished - 2010 May 13
Externally publishedYes
EventCeramics in Nuclear Applications - 33rd International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: 2009 Jan 182009 Jan 23

Publication series

NameCeramic Engineering and Science Proceedings
Number10
Volume30
ISSN (Print)0196-6219

Other

OtherCeramics in Nuclear Applications - 33rd International Conference on Advanced Ceramics and Composites
CountryUnited States
CityDaytona Beach, FL
Period09/1/1809/1/23

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Validation of ring-on-ring flexural test for nuclear ceramics using miniaturized specimens'. Together they form a unique fingerprint.

Cite this