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From Testing to Modelling – Prediction of Mechanical Behavior of Ceramic Matrix Composites

Koch, Dietmar and Shi, Yuan and Hofmann, Severin (2016) From Testing to Modelling – Prediction of Mechanical Behavior of Ceramic Matrix Composites. 40th International Conference and Expo on Advanced Ceramics and Composites, 24.-29. Jan. 2016, Florida, USA. (Unpublished)

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The application of Ceramic Matrix Composites (CMC) strongly depends on the precise prediction of the failure behavior under real loading conditions. Therefore a comprehensive modeling approach is necessary which describes experimental testing results dependent on microstructure and fiber orientation as well as local defects like delamination or voids. The deterministic simulation presented here is based on a design chain consisting of non destructive investigation of microstructure, inverse laminate theory for definition of laminate properties, finite element modeling for calculation of critical stresses and strains, definition of failure criteria, and resulting failure prediction considering effects of defects. Experimental data from alloxide composite Whipox as well as from C/C-SiC processed via liquid Silicon infiltration are used in order to proof the design chain. It is shown that in-plane strength and stiffness of Whipox can be predicted precisely considering any fiber orientation. The impact of interlaminar defects on failure prediction is shown on C/C-SiC composites. Here defects are implemented in the finite element model considering microstructural Information from computer tomography and ultrasonic inspection. With use of fracture mechanical data damage evolution and valid failure prediction is possible and design and optimized engineering of CMC components is achievable.

Item URL in elib:https://elib.dlr.de/108971/
Document Type:Conference or Workshop Item (Speech)
Title:From Testing to Modelling – Prediction of Mechanical Behavior of Ceramic Matrix Composites
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Shi, Yuanyuan.shi (at) dlr.deUNSPECIFIED
Hofmann, Severinseverin.hofmann (at) dlr.deUNSPECIFIED
Date:January 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Ceramic Matrix Composites, Simulation, Design, Fracture Mechanics, Modeling, Laminate theory
Event Title:40th International Conference and Expo on Advanced Ceramics and Composites
Event Location:Florida, USA
Event Type:international Conference
Event Dates:24.-29. Jan. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Shi, Dr.-Ing. Yuan
Deposited On:19 Dec 2016 11:07
Last Modified:19 Dec 2016 11:07

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