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Evaluation methods for the hoop strength of small-sized tubular ceramic components

Published online by Cambridge University Press:  31 January 2011

Seong-Gu Hong ,
Thak-Sang Byun ,
Lance L. Snead  and
Chong Soo Lee
Seong-Gu Hong*
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
Thak-Sang Byun
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
Lance L. Snead
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Chong Soo Lee
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
*
a) Address all correspondence to this author. e-mail: [email protected] or [email protected]
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Abstract

Miniaturized test methods were developed and applied to measure the hoop strength of small tubular components. A diametrical loading method and an internal pressurization method using elastomeric insert were adopted in the development of testing methods. Detailed analyses to assess these testing methods were attempted by using theoretical solutions and finite element analysis for stress distributions and the characteristics of the Weibull statistics. To demonstrate the applicability of the test methods, commercially available alumina tubes and miniature silicon carbide coatings from surrogate nuclear fuel particles were tested and their fracture strength distributions were analyzed with Weibull statistics. The size scaling relationship on the fracture strength was investigated by correlating with effective surface area. Furthermore, the applicability of the testing methods was discussed in terms of multiaxial stress fields, altered stress distribution by flattened loading contact, and availability of insert, focusing on high-temperature applications.

Keywords

CeramicCoatingFracture
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 4 , April 2009 , pp. 1422 - 1434
Copyright
Copyright © Materials Research Society 2009

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