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Size effect of carbon fiber-reinforced silicon carbide composites (C/C-SiC) : Part 2 - tensile testing with alignment device

Title data

Flauder, Stefan ; Bombarda, Ilaria ; D’Ambrosio, Roberto ; Langhof, Nico ; Lazzeri, Andrea ; Krenkel, Walter ; Schafföner, Stefan:
Size effect of carbon fiber-reinforced silicon carbide composites (C/C-SiC) : Part 2 - tensile testing with alignment device.
In: Journal of the European Ceramic Society. Vol. 42 (2022) Issue 4 . - pp. 1227-1237.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2021.11.044

Abstract in another language

The appropriate assessment of mechanical properties is essential to design ceramic matrix composites. The size
effect of strength plays a key role for the material understanding and the transfer from lab-scale samples to components.
In order to investigate the size effect for carbon fiber-reinforced silicon carbon (C/C-SiC) under tensile
load, a tensile testing with a minimum of deviation from the pure tensile loading is necessary. Hence, a hybrid
edge/face-loading test device for self-alignment and centering of C/C-SiC tensile samples was developed, evaluated
and proved to ensure pure tensile load. The mechanical analysis of more than 190 samples with two different
cross-sections fabricated from the same material population revealed no significant difference in tensile
strength. Although the volume under load was increased from 129 to 154 mm3, the tensile strengths of 162 ± 7 MPa
and 164 ± 6 MPa did not change. These results are discussed regarding the weakest link and energetic size effect
approaches.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Ceramic matrix composites (CMC); C/C-SiC; Tensile testing; Size effect of strength; Alignment device
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Ceramic Materials
Faculties > Faculty of Engineering Science > Chair Ceramic Materials > Chair Ceramic Materials - Univ.-Prof. Dr.-Ing. Stefan Schafföner
Faculties
Faculties > Faculty of Engineering Science
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 29 Nov 2021 08:00
Last Modified: 20 Jan 2022 14:22
URI: https://eref.uni-bayreuth.de/id/eprint/68016