Fracture toughness testing of biomedical ceramic-based materials using beams, plates and discs
| Autor: | Tanja Lube, Michael Wendler, Renan Belli, Ulrich Lohbauer, Anselm Petschelt |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Tension (physics) 030206 dentistry 02 engineering and technology Bending 021001 nanoscience & nanotechnology Biaxial flexure 03 medical and health sciences 0302 clinical medicine Fracture toughness visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material Fracture Toughness Testing 0210 nano-technology Beam (structure) |
| Zdroj: | Journal of the European Ceramic Society. 38:5533-5544 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2018.08.012 |
| Popis: | 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-KIc test has shown to be versatile and account for a very small overestimation of the KIc-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 ∼8% of the KIc-value compared to the new calculation by Strobl et al. for materials with Poisson’s ratio |
| Databáze: | OpenAIRE |
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