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Mechanical behaviour of C/C-SiC sandwich structures under shear load

Heidenreich, Bernhard and Kraft, Harald and Bamsey, Nathan and Such-Taboada, Miguel (2021) Mechanical behaviour of C/C-SiC sandwich structures under shear load. International Journal of Applied Ceramic Technology. Wiley. doi: 10.1111/ijac.13818. ISSN 1546-542X.

Full text not available from this repository.

Abstract

Carbon fiber reinforced carbon-silicon carbide (C/C-SiC) sandwich structures have been developed using the Liquid Silicon Infiltration process and the in situ joining method. They offer high mass-specific stiffness, low thermal expansion, and high environmental stability. Potential application areas are highly precise satellite structures, like optical benches. In this study, sandwich samples were manufactured using prepregs based on 2D carbon fibre fabrics and a phenolic resin precursor. Carbon fibre reinforced polymer preforms for folded and grid-cores, as well as for the skin panels were manufactured using autoclave technique. In the second step, the sandwich components were pyrolyzed, leading to C/C preforms. For the build-up of the sandwich samples, two skin panels were joined to a core structure and subsequently, the resulting C/C sandwich preform was siliconized. C/C-SiC sandwich samples were tested under shear load. Shear strength, modulus, and fracture strain were determined and compared to the results obtained by analytical calculation. The shear properties were dependent on the fiber orientation in the core structure as well as on the core type and orientation. The sandwich shear stiffness obtained in the tests was close to the expected theoretical values, calculated on the basis of the material properties and the core geometry.

Item URL in elib:https://elib.dlr.de/145082/
Document Type:Article
Title:Mechanical behaviour of C/C-SiC sandwich structures under shear load
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Heidenreich, BernhardBernhard.Heidenreich (at) dlr.dehttps://orcid.org/0000-0002-4330-8844
Kraft, HaraldHarald.Kraft (at) dlr.deUNSPECIFIED
Bamsey, NathanESTECUNSPECIFIED
Such-Taboada, MiguelESTECUNSPECIFIED
Date:2021
Journal or Publication Title:International Journal of Applied Ceramic Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1111/ijac.13818
Publisher:Wiley
ISSN:1546-542X
Status:Published
Keywords:Keramische Verbundwerkstoffe, Sandwichbauweise, Ceramic matrix composites, sandwich design
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Smart Retroreflectors
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Institute of Structures and Design > Structural Integrity
Deposited By: Heidenreich, Bernhard
Deposited On:02 Nov 2021 10:54
Last Modified:02 Nov 2021 10:54

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