Comparison of biaxial strength measured with the Ball-on-Three-Balls- and the Ring-on-Ring-test

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

The Ball-on-Three-Balls-test (B3B) and the Ring-on-Ring-test (RoR) were conducted on alumina discs and compared based on Weibull-Theory. The influence of various intermediate layers was evaluated. To support these findings, Finite-Element-Analysis was conducted to analyze the effects of deviations from ideal loading conditions. The influence of friction between sample and fixture and the effects of an inhomogeneous load distribution on the maximum stress were investigated. The experiments demonstrated that measuring corresponding strength values with both testing methods is possible. To properly asses the strength using the RoR-test, intermediate layers must be used. Teflon-foils or adhesive tapes are considered suitable. If no intermediate layer is used, the materials strength will be underestimated. Finite-Element-calculations show that this effect cannot be explained by the influence of friction and is rather caused by a non-homogeneous load distribution along the load-ring. Fractography supports these findings.
OriginalspracheEnglisch
Aufsatznummer100101
Seitenumfang10
FachzeitschriftOpen ceramics
Jahrgang6
AusgabenummerJune
DOIs
PublikationsstatusVeröffentlicht - Juni 2021

Bibliographische Notiz

Funding Information:
M. Staudacher gratefully acknowledges financial support by the Austrian BMVIT and BMWFW in the project “CharAM” ( FFG 877684 ) of the COIN/IraSME program. J. Schlacher gratefully acknowledges financial support by the ERC Consolidator Grant 817615 – “CeraText". Furthermore, the authors want to thank the reviewers for their valuable input during revision.

Publisher Copyright:
© 2021 The Author(s)

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