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Effect of coupon geometry and preload on flexural properties of oxide ceramic matrix composites

Lehnert, Tobias and Shi, Yuan and Roßdeutscher, Jan and Panthen, Britta and Wamser, Thomas and Lauer, Andreas and Jemmali, Raouf and Cepli, Daniel (2022) Effect of coupon geometry and preload on flexural properties of oxide ceramic matrix composites. International Journal of Applied Ceramic Technology. Wiley. doi: 10.1111/ijac.14307. ISSN 1546-542X.

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Official URL: https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijac.14307

Abstract

Oxide ceramic matrix composites (O-CMCs) have a high potential for usage in thermal protection systems or combustion chambers because of their low weight, temperature- and corrosion stability as well as non-brittle failure behavior. Mechanical property changes over their lifetime due to operational loads are not well understood. Moreover, mechanical properties from planar samples under laboratory conditions often differ substantially from upscaled components with complex geometries. In this work, the influences of curvature and preloading conditions were investigated experimentally using modeling to determine boundary conditions. Effects of curvature and trends among preload conditions were determined, with high-cycle-fatigue-preload (HCF) reducing strength and Young’s Modulus by 15% compared to their original values where low-cycle-fatigue-preload (LCF) had smaller effect. The low impacts of high temperatures and small-to-medium loads on the properties of O-CMCs makes them an interesting choice for high-temperature combustive environments.

Item URL in elib:https://elib.dlr.de/193662/
Document Type:Article
Title:Effect of coupon geometry and preload on flexural properties of oxide ceramic matrix composites
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Lehnert, TobiasUNSPECIFIEDhttps://orcid.org/0000-0003-3319-8976UNSPECIFIED
Shi, YuanUNSPECIFIEDhttps://orcid.org/0000-0002-4210-9069UNSPECIFIED
Roßdeutscher, JanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Panthen, BrittaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wamser, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lauer, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jemmali, RaoufUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cepli, DanielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:17 December 2022
Journal or Publication Title:International Journal of Applied Ceramic Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1111/ijac.14307
Publisher:Wiley
ISSN:1546-542X
Status:Published
Keywords:CMC, Oxide Ceramics, Preloads, Residual Properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration, L - Future Engines and Engine Integration
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Institute of Materials Research > Structural and Functional ceramics
Deposited By: Lehnert, Tobias
Deposited On:30 Jan 2023 07:58
Last Modified:28 Jun 2023 13:57

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