Journal Published Online: 04 March 2008
Volume 36, Issue 3

Simple Expressions for the Evaluation of Stresses in Sphere-Loaded Disks Under Biaxial Flexure

CODEN: JTEVAB

Abstract

In testing ceramic materials, sphere-loaded disk tests are of increasing importance. Three different tests including one, four, and six spheres are addressed. For the first two tests, the maximum stress in the disk center was already studied in several papers. In this note, simple analytical relations for the distribution of the tangential stress will be given. The stress distribution in the center region is, for instance, necessary for the determination of effective surface and volume as used for Weibull statistics. For special applications also, stresses across larger distances from the center are desirable. As an example, strength tests on coarse-grained alumina are mentioned briefly which need a fracture mechanics evaluation for interpretation.

Author Information

Fett, T.
Universität Karlsruhe, Institut für Keramik im Maschinenbau, Karlsruhe, Germany Forschungszentrum Karlsruhe, Institut für Materialforschung II, Karlsruhe, Germany
Rizzi, G.
Forschungszentrum Karlsruhe, Institut für Materialforschung II, Karlsruhe, Germany
Esfehanian, M.
Universität Karlsruhe, Institut für Keramik im Maschinenbau, Karlsruhe, Germany
Oberacker, R.
Universität Karlsruhe, Institut für Keramik im Maschinenbau, Karlsruhe, Germany
Pages: 6
Price: $25.00
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Stock #: JTE101402
ISSN: 0090-3973
DOI: 10.1520/JTE101402