The ball-on-three-balls strength test: In-situ testing through X-ray radiography and tomography

Maximilian Staudacher, Gustavo Pinzón, Jérôme Adrien, Joël Lachambre, Eric Maire, Jérôme Chevalier, Tanja Lube

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


Over the past two decades, the Ball-on-Three-Balls-test (B3B) has been increasingly used due to its low systematic error and simple execution. A limiting factor for a more wide-spread use of the B3B-test is the lack of an accurate analytical solution. This demands the use of numerical methods, such as Finite-Element-Analysis (FEA). In a recent work, FEA has been used to assess the influence of non-linear effects on the measured strength. To validate the utilized FEA-model, the experimental measurement of the specimen's deflection can be drawn on. Due to the design of the fixture for the B3B-test, common deflection-measurement methods are not straightforward. Therefore, X-ray tomography is employed in this paper to track the displacement of the load and support balls for thin plates of a high-strength glass and Ce-doped zirconia presenting transformation-induced plasticity. Furthermore, the ball displacement is also determined from two-dimensional radiographs and shows good agreement with FEA results.

FachzeitschriftOpen ceramics
PublikationsstatusVeröffentlicht - März 2024

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. The authors are grateful to the JECS Trust for funding the visit of M. Staudacher to INSA Lyon (Contract No. 2022305). The authors further thank SKF Austria AG for providing the Si 3 N 4 bearing balls.

Publisher Copyright:
© 2023 The Authors

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