Fracture toughness testing of biomedical ceramic-based materials using beams, plates and discs

Belli R, Wendler M, Petschelt A, Lube T, Lohbauer U (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Journal of the European Ceramic Society Elsevier

Book Volume: 38

Pages Range: 5533-5544

Journal Issue: 16

DOI: 10.1016/j.jeurceramsoc.2018.08.012

Abstract

The testing of fracture toughness becomes problematic when only limited amount of material is available that hinders the production of typical beam specimens to be tested in bending. Here we explore fracture toughness testing methodologies that allow for small discs and plates having surface cracks to be tested in biaxial flexure using the Ball-on-3-balls (B3B) set-up, or sawed notches as in the Compact Tension geometry. The B3B-K-Ic test has shown to be versatile and account for a very small overestimation of the K-Ic-value in the order of 0.8-1.25% due to in-plane crack mispositioning, and a maximum of 4% if a worst-case scenario of additional out-of-plane mispositioning is assumed. The geometrical factor in the standard SCF method, derived by Newman and Raju, resulted in an overestimation of similar to 8% of the K-Ic-value compared to the new calculation by Strobl et al. for materials with Poisson's ratio < 0.3.

Authors with CRIS profile

Renan Belli Department of Operative Dentistry and Periodontology Anselm Petschelt Lehrstuhl für Zahn-,Mund- und Kieferheilkunde, insbesondere Zahnerhaltung, Parodontologie und Kinderzahnheilkunde Ulrich Lohbauer Medizinische Fakultät

Involved external institutions

Montanuniversität Leoben AT Austria (AT)

How to cite

APA:

Belli, R., Wendler, M., Petschelt, A., Lube, T., & Lohbauer, U. (2018). Fracture toughness testing of biomedical ceramic-based materials using beams, plates and discs. Journal of the European Ceramic Society, 38(16), 5533-5544. https://dx.doi.org/10.1016/j.jeurceramsoc.2018.08.012

MLA:

Belli, Renan, et al. "Fracture toughness testing of biomedical ceramic-based materials using beams, plates and discs." Journal of the European Ceramic Society 38.16 (2018): 5533-5544.

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