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Evaluation of Elastic Properties of Ceramic Matrix Composites via Impulse Excitation Technique and FEM Optimisation Studies

Hönig, Sandrine and Paolella, Vincenzo and Roßdeutscher, Jan and Leber, Tim and Jemmali, Raouf and Gottschalk, Nicole and Süß, Fabia (2023) Evaluation of Elastic Properties of Ceramic Matrix Composites via Impulse Excitation Technique and FEM Optimisation Studies. NAFEMS, Robust Design & Design of Experiments (DoE) with Real Defects, 13.-14. March 2023, Munich, Germany.

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Official URL: https://www.nafems.org/publications/resource_center/robust_03_23_pres_01/


The German Aerospace Center (DLR) developed among others 3D printed quasi monolithic ceramics (SiSiC) and ceramic matrix composites (SiC/SiC) for energy and jet engine applications. These ceramic composites exhibit high strengths and long lifetimes under high temperatures (>1000°C). The characterization of material properties, which is required for accurate FEM modeling, is limited by manufacturing and machining processes. A method was developed to realistically generate certain missing room temperature properties. The non-destructive "Impulse Excitation Technique" (IET) was used to measure natural frequencies of 3D-printed SiSiC components and wound SiC/SiC components. Computed tomography scans were used to generate geometrical digital models including real defects. Using the geometrical models and some assumed material properties, modal analyses were performed in Ansys. Finally, the virtual material properties were optimized using Ansys optiSLang software; the optimization target was the experimental natural frequencies. The final result was a generation of realistic virtual material properties for 3D printed SiSiC and wound SiC/SiC components.

Item URL in elib:https://elib.dlr.de/196188/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluation of Elastic Properties of Ceramic Matrix Composites via Impulse Excitation Technique and FEM Optimisation Studies
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hönig, SandrineUNSPECIFIEDhttps://orcid.org/0000-0003-1217-5396UNSPECIFIED
Gottschalk, NicoleUNSPECIFIEDhttps://orcid.org/0000-0002-3303-5600UNSPECIFIED
Süß, FabiaUNSPECIFIEDhttps://orcid.org/0000-0002-5016-5781UNSPECIFIED
Date:March 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Impulse Excitation Technique, IET, RFDA, Resonance Frequency Damping Analysis, CMC, Ceramic Matrix Composite, modal analysis, optimization
Event Title:NAFEMS, Robust Design & Design of Experiments (DoE) with Real Defects
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:13.-14. March 2023
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for High-Temperature Thermal Technologies, L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Hönig, Dipl.-Ing. Sandrine
Deposited On:10 Aug 2023 09:17
Last Modified:10 Aug 2023 09:17

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